Derrick Henry Lehmer Scientist

Derrick Henry "Dick" Lehmer (February 23, 1905 – May 22, 1991) was an American mathematician who refined Édouard Lucas' work in the 1930s and devised the Lucas–Lehmer test for Mersenne primes. Lehmer's peripatetic career as a number theorist, with he and his wife taking numerous types of work in the United States and abroad to support themselves during the Great Depression, fortuitously brought him into the center of research into early electronic computing.

Personal facts

Birth date	February 23, 1905
Birth place	Berkeley California
Nationality	United States
Date of death	May 22, 1991
Education	Brown University
Known for	Lucas–Lehmer primality test Aliquot sequence Lehmer's conjecture Lehmer number Lehmer–Schur algorithm Lehmer mean Lucas primality test Salem number Lehmer matrix Lehmer code Lehmer's GCD algorithm Lehmer sieve Lucas–Lehmer–Riesel test Lehmer random number generator Pocklington primality test