1000
999	1001
List of numbers — Integers << 1k 2k 3k 4k 5k 6k 7k 8k 9k >> 999 is the telephone number for the emergency services in the United Kingdom and Hong Kong. ... 1001 is the natural number preceding 1002 and following 1000. ... This is a list of articles about numbers (not about numerals). ... The integers consist of the positive natural numbers (1, 2, 3, …), their negatives (−1, −2, −3, ...) and the number zero. ... Nine hundred is the natural number following eight hundred ninety-nine and preceding nine hundred one. ... 2000 (two thousand) is the natural number following 1999 and preceding 2001. ... Three thousand (3000) is the natural number following 2999 and preceding 3001. ... Four thousand (4000) is the natural number following 3999 and preceding 4001. ... Five thousand (5000) is the natural number following 4999 and preceding 5001. ... Six thousand (6000) is the natural number following 5999 and preceding 6001. ... 7000 is the natural number following 6999 and preceding 7001. ... 8000 (eight thousand) is the natural number following 7999 and preceding 8001. ... 9000 is the natural number following 8999 and preceding 9001. ... Ten thousand (10,000) is the natural number following 9999 and preceding 10,001. ...
Cardinal	1000 one thousand
Ordinal	1000th (one thousandth)
Numeral system
Factorization
Prime
Divisor(s)
Roman numeral	Ⅿ
Unicode symbol(s)	Ⅿ, ⅿ, ↀ
Greek Prefix	chilia
Latin Prefix	milli
Binary	1111101000
Octal	1750
Duodecimal	6B4
Hexadecimal	3E8

1000 (one thousand) is the natural number following 999 and preceding 1001. In linguistics, cardinal numbers is the name given to number words that are used for quantity (one, two, three), as opposed to ordinal numbers, words that are used for order (first, second, third). ... Commonly, ordinal numbers, or ordinals for short, are numbers used to denote the position in an ordered sequence: first, second, third, fourth, etc. ... A numeral is a symbol or group of symbols that represents a number. ... In mathematics, factorization or factoring is the decomposition of an object (for example, a number, a polynomial, or a matrix) into a product of other objects, or factors, which when multiplied together give the original. ... In mathematics, a prime number (or a prime) is a natural number that has exactly two natural number divisors. ... In mathematics, a divisor of an integer n, also called a factor of n, is an integer which evenly divides n without leaving a remainder. ... The system of Roman numerals is a numeral system originating in ancient Rome, and was adapted from Etruscan numerals. ... Technical note: Due to technical limitations, some web browsers may not display some special characters in this article. ... A numerical prefix is a prefix that denotes a number, which is usually a multiplier for the thing being prefixed. ... Latin is an ancient Indo-European language originally spoken in the region around Rome called Latium. ... A numerical prefix is a prefix that denotes a number, which is usually a multiplier for the thing being prefixed. ... The binary numeral system (base 2 numerals) represents numeric values using two symbols, typically 0 and 1. ... The octal numeral system is the base-8 number system, and uses the digits 0 to 7. ... A duodecimal multiplication table The duodecimal (also known as base-twelve or dozenal) system is a numeral system using twelve as its base. ... In mathematics and computer science, hexadecimal, or simply hex, is a numeral system with a radix or base of 16 usually written using the symbols 0–9 and A–F or a–f. ... In mathematics, a natural number is either a positive integer (1, 2, 3, 4, ...) or a non-negative integer (0, 1, 2, 3, 4, ...). The former definition is generally used in number theory, while the latter is preferred in set theory and computer science. ... 999 is the telephone number for the emergency services in the United Kingdom and Hong Kong. ... 1001 is the natural number preceding 1002 and following 1000. ...

In mathematics

• The decimal representation for one thousand is a one followed by three zeroes.
• In scientific notation, it's written as 1 × 10³.
• The SI prefix for a thousand is "kilo-".
• This is also abbreviated as k: 30,000 can be written 30k

Look up one in Wiktionary, the free dictionary. ... 0 (zero), alternatively called naught, nil, nada, ought, zilch, zip, nothing or nought, is both a number and a numeral. ... {{= Description == In scientific notation numbers are written as where the exponent b is an integer and a is any real number. ... The International System of Units (abbreviated SI from the French language name Système International dUnités) is the modern form of the metric system. ... An SI prefix is a prefix that can be applied to an SI unit to form a decimal multiple or submultiple. ... Kilo (symbol: k) is a prefix in the SI system denoting 103 or 1000. ...

In time

• A millennium has 1000 years. The year 1000 is the last year of the first millennium AD.

A millennium is a period of time, equal to one thousand years (from Latin mille, thousand, and annum, year). ... // Events World Population 300 million. ... Anno Domini (In the Year of the Lord), abbreviated as AD or A.D. defines an epoch based on the traditionally-reckoned year of the birth (or actually Incarnation) of Jesus of Nazareth. ...

In popular culture

Thousand (single) is a 1993 techno single by Moby. For information on the number 1000, see 1000 (number). ... 1993 (MCMXCIII) was a common year starting on Friday of the Gregorian calendar and marked the Beginning of the International Decade to Combat Racism and Racial Discrimination (1993-2003). ... Techno- is a prefix relating to technology. ... Moby (born Richard Melville Hall on September 11, 1965 in Harlem, New York City) is an American electronic musician. ...

In transportation

A common railway gauge is 1000 millimetres (3 ft 3.375 in). Narrow-gauge railways are railroads (railways) with track spaced at less than the standard gauge of 4 ft 8 in (1. ... A foot (plural: feet) is a non-SI unit of distance or length, measuring around a third of a meter. ... Mid-19th century tool for converting between different standards of the inch An inch is an Imperial and U.S. customary unit of length. ...

Trivia

To count to one thousand, counting one number every second continuously would take 16 minutes and 40 seconds. Look up second in Wiktionary, the free dictionary. ... A minute is a unit of time equal to 1/60th of an hour and to 60 seconds. ... Look up second in Wiktionary, the free dictionary. ...

Selected numbers in the thousands (1001-1999)

1001-1249

1001 - sphenic number, pentagonal number, pentatope number

1002 - sphenic number, Mertens function zero

1005 - Mertens function zero

1008 - divisible by the number of primes below it

1009 - first prime above 1000

1010 - Mertens function zero

1013 - Sophie Germain prime, centered square number, Mertens function zero

1014 - Mertens function zero

1015 - square pyramidal number

1018 - Mertens function zero

1019 - Sophie Germain prime, safe prime

1020 - polydivisible number

1023 - is the highest number one can count to on one's fingers using binary

1024 - power of two, 32^2; in common use, the amount of bytes in a kilobyte (in 1999, the IEC coined kibibyte to use for 1024 with kilobyte being 1000, but this convention has not been widely adopted)

1027 - sum of the squares of the first eight primes

1031 - Sophie Germain prime

1035 - triangular number, hexagonal number

1049 - Sophie Germain prime, highly cototient number

1051 - centered pentagonal number

1056 - pronic number

1060 - sum of the first 25 primes

1071 - heptagonal number

1072 - centered heptagonal number

1079 - every positive integer is the sum of at most 1079 tenth powers.

1080 - pentagonal number

1081 - triangular number, member of Padovan sequence

1086 - Smith number

1087 - Chen prime, cousin prime, lucky prime, Kynea number

1089 - 33^2, nonagonal number, centered octagonal number

1091 - cousin prime and twin prime

1092- divisible by the number of primes below it

1093 - twin prime and star number

1103 - Sophie Germain prime, balanced prime

1104 - Keith number

1105 - Carmichael number, magic constant of n × n magic square and n-Queens Problem for n = 13, decagonal number, centered square number

1116 - divisible by the number of primes below it

1122 - pronic number, divisible by the number of primes below it

1123 - balanced prime

1128 - triangular number, hexagonal number, divisible by the number of primes below it

1134- divisible by the number of primes below it

1138 - special code for Easter eggs on Star Wars DVDs, because of George Lucas's movie THX-1138

1140 - tetrahedral number

1152 - highly totient number

1156 - 34^2, octahedral number, centered pentagonal number

1161 - sum of the first 26 primes

1162 - pentagonal number

1169 - highly cototient number

1170 - highest possible score in an NAQT match

1176 - triangular number

1177 - heptagonal number

1184 - amicable number with 1210

1187 - safe prime, Stern prime, balanced prime

1190 - pronic number

1198 - centered heptagonal number

1201 - centered square number

1210 - amicable number with 1184

1216 - nonagonal number

1219 - Mertens function zero

1220 - Mertens function zero

1223 - Sophie Germain prime, balanced prime

1225 - triangular number, 35^2, triangular square number, hexagonal number, centered octagonal number

1229 - Sophie Germain prime

1233 - 12^2 + 33^2

1240 - square pyramidal number

1241 - centered cube number

1242 - decagonal number

1247 - pentagonal number

1001 is the natural number preceding 1002 and following 1000. ... A sphenic number is a positive integer that is the product of three distinct prime factors. ... A pentagonal number is a figurate number that represents a pentagon. ... A pentatope number is a number in the fifth cell of any row of Pascals triangle starting with the 5-term row 1 4 6 4 1 either from left to right or from right to left. ... In number theory, the Mertens function is where μ(k) is the Möbius function. ... In mathematics, a prime number (or a prime) is a natural number that has exactly two natural number divisors. ... A prime number p is called a Sophie Germain prime if 2p + 1 is also prime. ... A centered square number is a centered figurate number that represents a square with a dot in the center and all other dots surrounding the center up to a certain city block distance, i. ... A pyramidal number, or square pyramidal number, is a figurate number that represents a pyramid with a base and four sides. ... A safe prime is a prime number of the form 2p + 1, where p is also a prime. ... In mathematics a polydivisible number is a number with digits that has the following properties :- Its first digit a is not 0. ... In mathematics, a power of two is any of the nonnegative integer powers of the number two; in other words, two times itself a certain number of times. ... This article refers to the unit of binary information. ... A kilobyte (derived from the SI prefix kilo-, meaning 1000) is a unit of information or computer storage equal to either 1024 or 1000 bytes. ... A triangular number is a number that can be arranged in the shape of an equilateral triangle. ... A hexagonal number is a figurate number that represents a hexagon. ... In number theory, a branch of mathematics, a highly cototient number k is an integer that has more solutions to the equation x - φ(x) = k, where φ is Eulers totient function, than any integer below it, with the exception of 1. ... A centered pentagonal number is a centered figurate number that represents a pentagon with a dot in the center and all other dots surrounding the center in successive pentagonal layers. ... A pronic number, or oblong number or heteromecic number, is a number which is the product of two consecutive nonnegative integers, that is, n(n + 1). ... A heptagonal number is a figurate number that represents a heptagon. ... A centered heptagonal number is a centered figurate number that represents a heptagon with a dot in the center and all other dots surrounding the center dot in successive heptagonal layers. ... The Padovan sequence is the sequence of integers P(n) defined by the initial values and the recurrence relation The first few values of P(n) are 1, 1, 1, 2, 2, 3, 4, 5, 7, 9, 12, 16, 21, 28, 37 . ... A Smith number is a number which in a given base, the sum of its digits is equal to the sum of the digits in its factorization. ... A prime number p is called a Chen prime if p + 2 is either a prime or a semiprime. ... In mathematics, a cousin prime is a pair of prime numbers that differ by four; compare this with twin primes, pairs of prime numbers that differ by two, and sexy primes, pairs of prime numbers that differ by six. ... Headline text A lucky prime is a number that is a prime number and a lucky number. ... A Kynéa number (pronounced: Ka-Nay), named after Kynéa R. Griffith, is an integer of the form . ... 1089 is the number after 1088 and before 1090. ... A nonagonal number or enneagonal number is a figurate number that represents a nonagon. ... A centered octagonal number is a centered figurate number that represents an octagon with a dot in the center and all other dots surrounding the center dot in successive octagonal layers. ... In mathematics, a cousin prime is a pair of prime numbers that differ by four; compare this with twin primes, pairs of prime numbers that differ by two, and sexy primes, pairs of prime numbers that differ by six. ... A twin prime is a prime number that differs from another prime number by two. ... A twin prime is a prime number that differs from another prime number by two. ... A star number, or centered 12-gonal number, is a centered figurate number that represents a centered hexagram, such as the one that Chinese checkers are played on. ... A balanced prime is a prime number that is equal to the arithmetic mean of the nearest prime above and below. ... In mathematics, a Keith number or repfigit number is an integer that appears as a term in a linear recurrence relation with initial terms based off its own digits. ... In number theory, a Carmichael number is a composite positive integer n which satisfies the congruence bn âˆ’ 1 ≡ 1 (mod n) for all integers b which are relatively prime to n (see modular arithmetic). ... The magic constant of a magic square, an n-by-n matrix, is defined such that the sum of any row, column or main diagonal yields the same result, denoted M2(n). ... In recreational mathematics, a magic square of order n is an arrangement of n² numbers, usually distinct integers, in a square, such that the n numbers in all rows, all columns, and both diagonals sum to the same constant. ... One of the 12 unique solutions The eight queens puzzle is the problem of putting eight chess queens on an 8×8 chessboard such that none of them is able to capture any other using the standard chess queens moves. ... A decagonal number is a figurate number that represents a decagon. ... 1138 is the number equal to 1000 + 100 + 30 + 8. ... The cover of the 2004 DVD widescreen release of the modified original Star Wars Trilogy. ... George Walton Lucas, Jr. ... THX 1138 was George Lucas first feature-length movie. ... A pyramid with side length 5 contains 35 spheres. ... A highly totient number k is an integer that has more solutions to the equation φ(x) = k, where φ is Eulers totient function, than any integer below it. ... An octahedral number is a figurate number that represents an octahedron, or two pyramids placed together, one upside-down underneath the other. ... National Academic Quiz Tournaments (LLC) is a question-writing and quizbowl organizing company founded by former players in 1996. ... Amicable numbers are two numbers so related that the sum of the proper divisors of the one is equal to the other, unity being considered as a proper divisor but not the number itself. ... A Stern prime is a prime number that is not the sum of a smaller prime and twice the square of a nonzero integer. ... A triangular square number is a number which is both a triangular number and a perfect square. ... A centered cube number is a centered figurate number that represents a cube. ...

1250-1499

1255 - Mertens function zero

1256 - Mertens function zero

1258 - Mertens function zero

1259 - highly cototient number

1260 - highly composite number, pronic number, vampire number

1261 - star number, Mertens function zero

1264 - sum of the first 27 primes

1266 - centered pentagonal number, Mertens function zero

1270 - Mertens function zero

1279 - Mertens function zero

1280 - Mertens function zero

1282 - Mertens function zero

1283 - safe prime

1285 - Mertens function zero

1288 - heptagonal number

1289 - Sophie Germain prime, Mertens function zero

1291 - Mertens function zero

1292 - Mertens function zero

1296 - 36^2, fourth power of 6, sum of the cubes of the first eight positive integers, the number of rectangles on a normal 8x8 chessboard

1297 - Mertens function zero

1299 - Mertens function zero

1300 - Mertens function zero, largest possible win margin in an NAQT match

1301 - centered square number

1302 - Mertens function zero

1306 - Mertens function zero

1307 - safe prime

1318 - Mertens function zero

1319 - safe prime

1325 - Markov number

1326 - triangular number, hexagonal number, Mertens function zero

1329 - Mertens function zero

1330 - tetrahedral number

1331 - cube of 11, centered heptagonal number

1332 - pronic number

1335 - pentagonal number, Mertens function zero

1336 - Mertens function zero

1337 - Used in the novel form of spelling called leet

1338 - Mertens function zero

1342 - Mertens function zero

1350 - nonagonal number

1365 - pentatope number

1367 - safe prime, balanced prime

1369 - 37^2, centered octagonal number

1371 - sum of the first 28 primes

1378 - triangular number

1379 - magic constant of n × n magic square and n-Queens Problem for n = 14.

1381 - centered pentagonal number

1387 - super-Poulet number, decagonal number

1395 - vampire number

1404 - heptagonal number

1405 = 26^2 + 27^2 = 7^2 + 8^2 + ... + 16^2, centered square number

1406 - pronic number, semi-meandric number

1409 - Sophie Germain prime

1419 - Zeisel number

1425 - self-descriptive number in base 5

1426 - pentagonal number

1430 - Catalan number

1431 - triangular number, hexagonal number

1432 - member of Padovan sequence

1435 - vampire number; the standard railway gauge in millimetres, equivalent to 4' 8½"

1439 - Sophie Germain prime, safe prime

1440 - a highly totient number and a 481-gonal number. Also, the number of minutes in one day, and the blocksize of a standard 3,5" floppy disk

1441 - star number

1444 - 38^2, smallest pandigital number in Roman numerals

1451 - Sophie Germain prime

1469 - octahedral number, highly cototient number

1470 - pentagonal pyramidal number

1471 - centered heptagonal number

1480 - sum of the first 29 primes

1481 - Sophie Germain prime

1482 - pronic number

1485 - triangular number

1487 - safe prime

1490 - tetranacci number

1491 - nonagonal number, Mertens function zero

1492 - Mertens function zero

1493 - Stern prime

1496 - square pyramidal number

1499 - Sophie Germain prime

A highly composite number is a positive integer which has more divisors than any positive integer below it. ... A vampire number (or true vampire number) is a composite natural number v, with an even number of digits n, that can be factored into two integers x and y each with n/2 digits and not both with trailing zeroes, where v contains all the digits from x and... In mathematics, the fourth powers are given by the expression a4 = a × a × a × a The sequence of fourth powers of integers goes: 1, 16, 81, 256, 625, 1296, 2401, 4096, 6561, 10000, ... They are also formed by multiplying a number by its cube. ... 6 (six) is the natural number following 5 and preceding 7. ... In geometry, a rectangle is a defined as a quadrilateral polygon in which all four angles are right angles. ... A chessboard is often painted or engraved on a chess table. ... National Academic Quiz Tournaments (LLC) is a question-writing and quizbowl organizing company founded by former players in 1996. ... A Markov number or Markoff number is an integer x, y or z that is part of a solution to the Markov Diophantine equation The first few Markov numbers are 1, 2, 5, 13, 29, 34, 89, 169, 194, 233, 433, 610, 985, 1325, ... (sequence A002559 in OEIS) appearing in... In arithmetic and algebra, the cube of a number n is its third power — the result of multiplying it by itself two times: n3 = n × n × n. ... 11 (eleven) is the natural number following 10 and preceding 12. ... The factual accuracy of this article is disputed. ... The magic constant of a magic square, an n-by-n matrix, is defined such that the sum of any row, column or main diagonal yields the same result, denoted M2(n). ... In recreational mathematics, a magic square of order n is an arrangement of n² numbers, usually distinct integers, in a square, such that the n numbers in all rows, all columns, and both diagonals sum to the same constant. ... One of the 12 unique solutions The eight queens puzzle is the problem of putting eight chess queens on an 8×8 chessboard such that none of them is able to capture any other using the standard chess queens moves. ... A super-Poulet number is a Poulet number whose every divisor d divides 2d - 2. ... A vampire number (or true vampire number) is a composite natural number v, with an even number of digits n, that can be factored into two integers x and y each with n/2 digits and not both with trailing zeroes, where v contains all the digits from x and... In mathematics, a meander or closed meander is a self-avoiding closed curve which intersects a line a number of times. ... A Zeisel number is a square-free integer k with at least three prime factors which fall into the pattern where a and b are fixed constants and x is the index number of each prime factor in the factorization, sorted from lowest to highest. ... A self-descriptive number is an integer m that in a given base b is b-digits long in which each digit d at position n (the most significant digit being at position 0 and the least significant at position b - 1) counts how many instances of digit n are... In combinatorial mathematics, the Catalan numbers form a sequence of natural numbers that occur in various counting problems; which often have a recursive flavour. ... A vampire number (or true vampire number) is a composite natural number v, with an even number of digits n, that can be factored into two integers x and y each with n/2 digits and not both with trailing zeroes, where v contains all the digits from x and... A highly totient number k is an integer that has more solutions to the equation φ(x) = k, where φ is Eulers totient function, than any integer below it. ... In mathematics, a polygonal number is a number that can be arranged as a regular polygon. ... A pentagonal pyramidal number is a number equal to the sum of the first few pentagonal numbers. ... In mathematics, the Fibonacci numbers form a sequence defined recursively by: In other words: one starts with 0 and 1, and then produces the next Fibonacci number by adding the two previous Fibonacci numbers. ...

1500-1749

1501 - centered pentagonal number

1511 - Sophie Germain prime, balanced prime

1513 - centered square number

1518 - Mertens function zero

1519 - Mertens function zero

1520 - pentagonal number, Mertens function zero

1521 - Mertens function zero, 39^2, centered octagonal number

1523 - Mertens function zero, safe prime

1524 - Mertens function zero

1525 - heptagonal number, Mertens function zero

1527 - Mertens function zero

1528 - Mertens function zero

1530 - vampire number

1531 - Mertens function zero

1532 - Mertens function zero

1535 - Thabit number

1537 - Keith number, Mertens function zero

1540 - triangular number, hexagonal number, decagonal number, tetrahedral number

1543 - Mertens function zero

1544 - Mertens function zero

1546 - Mertens function zero

1556 - sum of the squares of the first nine primes

1559 - Sophie Germain prime

1560 - pronic number

1575 - odd abundant number

1583 - Sophie Germain prime

1593 - sum of the first 30 primes

1596 - triangular number

1597 - Fibonacci number, Markov number

1600 - 40^2, street number on Pennsylvania avenue of the White House, perfect score on SAT tests administered prior to 2005

1601 - Sophie Germain prime, the novel 1601 (Mark Twain)

1616 - the year Shakespeare died

1617 - pentagonal number

1618 - centered heptagonal number

1619 - safe prime

1625 - centered square number

1626 - centered pentagonal number

1633 - star number

1638 - harmonic divisor number

1639 - nonagonal number

1640 - pronic number

1649 - highly cototient number

1651 - heptagonal number

1653 - triangular number, hexagonal number

1657 - cuban prime

1666 - largest efficient pandigital number in Roman numerals (each symbol occurs exactly once)

1679 - highly cototient number

1680 - highly composite number

1681 - 41^2, smallest number yielded by the formula n^2 + n + 41 that is not a prime; centered octagonal number

1695 - magic constant of n × n magic square and n-Queens Problem for n = 15.

1701 - decagonal number, hull number of the Starship Enterprise on Star Trek

1705 - tribonacci number

1711 - triangular number

1717 - pentagonal number

1720 - sum of the first 31 primes

1722 - Giuga number, pronic number

1728 - the quantity expressed as 1000 in duodecimal, that is, the cube of twelve (called a great gross), and so, the number of cubic inches in a cubic foot

1729 - taxicab number, Carmichael number, Zeisel number, centered cube number. In the decimal expansion of e the first time all 10 digits appear in sequence starts at the 1729th decimal place. In 1979 the rock musical Hair closed on Broadway in New York City after 1729 performances.

1733 - Sophie Germain prime

1741 - centered square number

1747 - balanced prime

A vampire number (or true vampire number) is a composite natural number v, with an even number of digits n, that can be factored into two integers x and y each with n/2 digits and not both with trailing zeroes, where v contains all the digits from x and... A Thabit number is an integer of the form . ... In mathematics, an abundant number or excessive number is a number n for which σ(n) > 2n. ... In mathematics, the Fibonacci numbers form a sequence defined recursively by: In other words, one starts with 0 and 1, and then produces the next Fibonacci number by adding the two previous Fibonacci numbers. ... A Markov number or Markoff number is an integer x, y or z that is part of a solution to the Markov Diophantine equation The first few Markov numbers are 1, 2, 5, 13, 29, 34, 89, 169, 194, 233, 433, 610, 985, 1325, ... (sequence A002559 in OEIS) appearing in... The southern side of the White House The White House is the official residence and principal workplace of the President of the United States of America. ... The SAT (pronounced S-A-T) Reasoning Test, formerly called the Scholastic Aptitude Test and Scholastic Assessment Test, is a type of standardized test frequently used by colleges and universities in the United States to aid in the selection of incoming students. ... [Date: 1601. ... A harmonic divisor number, or Ore number, is a number whose divisors, averaged in a harmonic mean, results in an integer. ... A cuban prime is a prime number that is a solution to one of two different specific equations involving third powers of x and y. ... The magic constant of a magic square, an n-by-n matrix, is defined such that the sum of any row, column or main diagonal yields the same result, denoted M2(n). ... In recreational mathematics, a magic square of order n is an arrangement of n² numbers, usually distinct integers, in a square, such that the n numbers in all rows, all columns, and both diagonals sum to the same constant. ... One of the 12 unique solutions The eight queens puzzle is the problem of putting eight chess queens on an 8×8 chessboard such that none of them is able to capture any other using the standard chess queens moves. ... Star Trek collectively refers to a science-fiction franchise spanning six unique television series, 726 episodes and ten feature films in addition to hundreds of novels, computer and video games, fan stories and other works of fiction all set within the same fictional universe created by Gene Roddenberry in the... In mathematics, the Fibonacci numbers form a sequence defined recursively by: In words: you start with 0 and 1, and then produce the next Fibonacci number by adding the two previous Fibonacci numbers. ... A Giuga number is a composite number n such that each of its distinct prime factors pi is a divisor of . ... A duodecimal multiplication table The duodecimal (also known as base-twelve or dozenal) system is a numeral system using twelve as its base. ... 12 (twelve) is the natural number following 11 and preceding 13. ... A great gross is equal to a dozen gross, i. ... Mid-19th century tool for converting between different standards of the inch An inch is an Imperial and U.S. customary unit of length. ... A foot (plural: feet) is a non-SI unit of distance or length, measuring around a third of a meter. ... 1729 is known as the Hardy-Ramanujan number, after a famous anecdote of the British mathematician G. H. Hardy regarding a hospital visit to the Indian mathematician Srinivasa Ramanujan. ... In mathematics, the n-th taxicab number, typically denoted Ta(n) or Taxicab(n), is defined as the smallest number which can be expressed as a sum of two positive cubes in n distinct ways, up to order of summands. ... ex is the unique function f, such that for any real number x, ex = f(x) = f(x). ... The original poster for the show. ...

1750-1999

1753 - balanced prime

1756 - centered pentagonal number

1764 - 42^2

1770 - triangular number, hexagonal number, Town of Seventeen Seventy in Australia

1771 - tetrahedral number

1772 - centered heptagonal number

1782 - heptagonal number

1785 - square pyramidal number

1791 - largest natural number that cannot be expressed as a sum of at most four hexagonal numbers.

1794 - nonagonal number

1800 - pentagonal pyramidal number, also, in da Ponte's Don Giovanni, the number of women Don Giovanni had slept with so far when confronted by Donna Elvira, according to Leporello's tally

1801 - cuban prime

1806 - pronic number

1811 - Sophie Germain prime

1820 - pentagonal number, pentatope number

1823 - safe prime

1827 - vampire number

1828 - meandric number, open meandric number

1830 - triangular number

1834 - octahedral number, sum of the cubes of the first five primes

1836 - factor by which a proton is more massive than an electron

1837 - star number

1841 - Mertens function zero

1843 - Mertens function zero

1844 - Mertens function zero

1845 - Mertens function zero

1849 - 43^2, centered octagonal number

1851 - sum of the first 32 primes

1853 - Mertens function zero

1854 - Mertens function zero

1857 - Mertens function zero

1861 - centered square number, Mertens function zero

1862 - Mertens function zero

1863 - Mertens function zero

1864 - Mertens function zero

1866 - Mertens function zero

1870 - decagonal number

1885 - Zeisel number

1889 - Sophie Germain prime, highly cototient number

1891 - triangular number, hexagonal number, centered pentagonal number

1892 - pronic number

1897 - member of Padovan sequence

1900 - 1900 or Novecento is a 1977 movie

1901 - Sophie Germain prime

1907 - safe prime, balanced prime

1918 - heptagonal number

1926 - pentagonal number

1929 - Mertens function zero

1931 - Sophie Germain prime

1933 - centered heptagonal number

1936 - 44^2

1938 - Mertens function zero

1951 - cuban prime

1953 - triangular number

1956 - nonagonal number

1969 - the movie 1969 (film)

1973 - Sophie Germain prime

1980 - pronic number

1984 - 11111000000 in binary also see 1984 (disambiguation)

1985 - centered square number

1988 - sum of the first 33 primes