5

This number is a prime.

Single Curio View:   (Seek other curios for this number)
The smallest prime p such that both 2p + 1 and 2p - 1 (= Mp) are primes. Note that both 2Mp - 1 and 2Mp - 1 are also primes. [Beedassy]

Submitted: 2009-08-27 02:27:27;   Last Modified: 2009-11-01 08:11:47.
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell