31374153439747236737

This number is a prime.

                                                       3137415343 9747236737

+ The only emirp that is an ordered concatenation of five 4-digit Honaker primes each formed from two double-digit primes, i.e., 3137, 4153, 4397, 4723, 6737. [Loungrides]

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell