Double Mersenne Prime
|Discovered by||Marin Mersenne|
|Number of||Conjectured to be 4|
|Description||A prime of the form 2^p-1 where p is of the form 2^m-1, where m is an integer|
|First Few||7, 127, 2,147,483,647|
A Double Mersenne Prime is a Mersenne Prime of the form 2p - 1 for which p is also a Mersenne Prime. There are currently only 4 known double Mersenne Primes: 7, 127, 2,147,483,647, and 170,141,183,460,469,231,731,687,303,715,884,105,727. It is conjectured that these are the only double Mersenne Primes in existence.