For those who don't know, Mersenne Primes are a special class of prime numbers with a specific formula:
2^p - 1 = Mersenne Prime, where p is also prime.
For example: 2^3 - 1 = 7, 2^5 - 1 = 31, and 2^7 - 1 = 127, etc.
But wait, there's more! We have a whole subpage dedicated to the Mersenne Primes of the world's greatest thinkers:
Mersenne Primes of Famous People