13

This number is a prime.

Single Curio View:   (Seek other curios for this number)
The number (coincidentally prime) of known positive integers which are not the sum of two semiprimes. [Capelle]

Submitted: 2006-10-14 02:34:51;   Last Modified: 2008-01-30 11:28:00.
Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell