Mathematician:Donald Bruce Gillies

Canadian mathematician and computer scientist.

In 1963, discovered the 21st, 22nd and 23rd Mersenne primes with the aid of the ILLIAC II computer. The largest of these ($2^{11 \ 213} - 1$) was reported in the Guinness Book of Records and immortalised on all mail sent from the postroom of the University of Illinois.

Nationality
Canadian

History

 * Born: October 15, 1928
 * Died: July 17, 1975

Theorems and Definitions

 * Mersenne primes $2^{9689} - 1$, $2^{9941} - 1$ and $2^{11\ 213} - 1$.