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Derrick Henry Lehmer (February 23, 1905–May 22, 1991) was an American mathematician who refined Edouard Lucas' work in the 1930s and devised the Lucas-Lehmer test for Mersenne primes. February 23 is the 54th day of the year in the Gregorian Calendar. ...
1905 (MCMV) was a common year starting on Sunday (see link for calendar). ...
May 22 is the 142nd day of the year in the Gregorian calendar (143rd in leap years). ...
1991 (MCMXCI) was a common year starting on Tuesday of the Gregorian calendar. ...
François Édouard Anatole Lucas (April 4, 1842 in Amiens - October 3, 1891) was a French mathematician who was educated at the École Normale Supérieure. ...
In mathematics, the Lucas-Lehmer test is a primality test for Mersenne numbers. ...
In mathematics, a Mersenne prime is a prime number that is one less than a prime power of two. ...
Early life
Lehmer was born in Berkeley, California, to Derrick Norman Lehmer, a professor of mathematics at the University of California at Berkeley, and Clara Eunice Mitchell. Berkeley as seen from the Claremont Canyon Regional Preserve. ...
Euclid, a famous Greek mathematician known as the father of geometry, is shown here in detail from The School of Athens by Raphael. ...
The University of California, Berkeley (also known as Cal, UC Berkeley, UCB, or simply Berkeley) is a prestigious, public, coeducational university situated in the foothills of Berkeley, California to the east of San Francisco Bay, overlooking the Golden Gate and its bridge. ...
He studied physics and earned a Bachelor degree from UC Berkeley, and continued with graduate studies at the University of Chicago. Physics (from the Greek, φυσικός (physikos), natural, and φÏσις (physis), nature) is the science of the natural world, which deals with the fundamental constituents of the universe, the forces they exert on one another, and the results of these forces. ...
A bachelors degree is usually an undergraduate academic degree awarded for a course that generally lasts three or four years. ...
The University of Chicago is a private university located principally in the Hyde Park neighborhood of Chicago, Illinois. ...
Marriage During his studies at Berkeley, Lehmer met Emma Markovna Trotskaia, a Russian student born on November 6, 1906, who was studying engineering. She subsequently changed her major and in 1928 earned a Bachelor degree in mathematics. Later that same year, Lehmer married Emma and they moved to Providence, Rhode Island, after Brown University offered him an instructorship. November 6 is the 310th day of the year (311th in leap years) in the Gregorian Calendar, with 55 days remaining. ...
1906 (MCMVI) was a common year starting on Monday (see link for calendar). ...
Bold text Engineering is the application of scientific and technical knowledge to solve human problems. ...
1928 (MCMXXVIII) was a leap year starting on Sunday (link will take you to calendar). ...
Nickname: Beehive of Industry, The Renaissance City Official website: http://www. ...
Brown University is an Ivy League university located in Providence, Rhode Island in the United States of America. ...
Career Lehmer received a Master's degree and a Ph.D., both from Brown University, in 1930. A masters degree is an academic degree usually awarded for completion of a postgraduate or graduate course of one to three years in duration. ...
Doctor of Philosophy, or Ph. ...
1930 (MCMXXX) is a common year starting on Wednesday. ...
He was a National Research Fellow at California Institute of Technology and Stanford University from 1930 to 1932. The California Institute of Technology (commonly referred to as Caltech) is a private, coeducational university located in Pasadena, California, in the United States. ...
Stanford redirects here. ...
1932 (MCMXXXII) was a leap year starting on Friday (the link will take you to a full 1932 calendar). ...
He worked at Lehigh University from 1934 until 1940. For one year (1938-1939), the couple went to Cambridge, England, on a Guggenheim Fellowship. The Lehmers had two children and returned to America by ship just before the beginning of the Battle of the Atlantic. Lehigh University is a private academic institution in Bethlehem, Pennsylvania, Pennsylvania, in the United States. ...
1934 (MCMXXXIV) was a common year starting on Monday (link will take you to calendar). ...
1940 (MCMXL) was a leap year starting on Monday (the link is to a full 1940 calendar). ...
Map of the Cambridgeshire area (1904) The city of Cambridge is an old English university town and the administrative centre of the county of Cambridgeshire. ...
Royal motto (French): Dieu et mon droit (Translated: God and my right) Englands location (dark green) within the United Kingdom (light green), with the Republic of Ireland (blue) to its west Languages English Capital London Largest city London Area – Total Ranked 1st UK 130,395 km² Population – Total (mid...
Guggenheim Fellowships are awarded annually by the John Simon Guggenheim Memorial Foundation to those who have demonstrated exceptional capacity for productive scholarship or exceptional creative ability in the arts. ...
The Second Battle of the Atlantic was the longest continuous military campaign of World War II, running from 1939 right through to the defeat of Nazi Germany in 1945, and was at its height from mid-1940 through to about the end of 1943. ...
In 1940, Lehmer accepted a position in the mathematics department of the University of California at Berkeley. At some point in his career there, he developed the Linear congruential generator (Pseudorandom number generator), which is frequently referred to as a Lehmer random number generator. He continued working at UC Berkeley until 1972, the year he became professor emeritus. 1940 (MCMXL) was a leap year starting on Monday (the link is to a full 1940 calendar). ...
Linear congruential generators (LCGs) represent one of the oldest and best-known pseudorandom number generator algorithms. ...
A pseudorandom number generator (PRNG) is an algorithm that generates a sequence of numbers which are not truly random. ...
1972 (MCMLXXII) was a leap year starting on Saturday (the link is to a full 1972 calendar). ...
A professor is a senior teacher and researcher, usually in a college or university. ...
From 1945-1946, Lehmer worked on ENIAC, the first electronic computer in the United States. 1945 (MCMXLV) was a common year starting on Monday (the link is to a full 1945 calendar). ...
1946 (MCMXLVI) was a common year starting on Tuesday. ...
ENIAC ENIAC, short for Electronic Numerical Integrator and Computer, was the first large-scale, electronic, digital computer capable of being reprogrammed to solve a full range of computing problems[1], although earlier computers had been built with some of these properties. ...
The tower of a personal computer. ...
Death Derrick Henry Lehmer died in Berkeley on May 22, 1991. May 22 is the 142nd day of the year in the Gregorian calendar (143rd in leap years). ...
See also Euclid, a famous Greek mathematician known as the father of geometry, is shown here in detail from The School of Athens by Raphael. ...
François Édouard Anatole Lucas (April 4, 1842 in Amiens - October 3, 1891) was a French mathematician who was educated at the École Normale Supérieure. ...
In mathematics, the Lucas-Lehmer test is a primality test for Mersenne numbers. ...
In mathematics, the Lucas-Lehmer test is a primality test for Mersenne numbers. ...
In mathematics, a prime number (or a prime) is a natural number that has exactly two (distinct) natural number divisors, which are 1 and the prime number itself. ...
In mathematics, a Mersenne prime is a prime number that is one less than a prime power of two. ...
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