19423
This number is a prime.
The only emirp formed from two successive double-digit primes (19, 23) by inserting their difference between them. [Loungrides]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell
This number is a prime.
The only emirp formed from two successive double-digit primes (19, 23) by inserting their difference between them. [Loungrides]