# Mersenne prime

Definition from Wiktionary, the free dictionary

## Contents

## English[edit]

### Etymology[edit]

Named after Marin Mersenne (1588–1648), French theologian, philosopher, mathematician, and music theorist.

### Noun[edit]

**Mersenne prime** (*plural* **Mersenne primes**)

- (number theory) A prime number which is one less than a power of two (2
^{n}– 1; e.g. 31 = 2^{5}– 1).