31139

This number is a prime.

+ 31139 = (π(3!) + π(1!) + π(1!) + π(3!) + π(9!)) + (π(3!2) + π(1!2) + π(1!2) + π(3!2) + π(9!2)). Note that prime 31139 is the only odd number with this property. [Firoozbakht]

Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell