This number is a prime.
Single Curio View: (Seek other curios for this number)521 is the smallest Mersenne prime exponent that exceeds the sum of all smaller ones. [Terr]
Submitted: 2002-10-24 17:30:44; Last Modified: 2009-03-07 22:38:10.
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell