# Mathematician:Donald Bruce Gillies

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## Mathematician

Canadian mathematician and computer scientist.

In $1963$, discovered the $21$st, $22$nd and $23$rd 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 $2^{11 \, 213} - 1$.