1242421
This number is a prime.
A palindromic prime in which ((1+2+4+2+4+2+1)! - 1242421) and ((1+2+4+2+4+2+1)! + 1242421) are primes. [Sariyar]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell
This number is a prime.
A palindromic prime in which ((1+2+4+2+4+2+1)! - 1242421) and ((1+2+4+2+4+2+1)! + 1242421) are primes. [Sariyar]