19998991

This number is a prime.

+ p = 19998989 and q = 19998991 are a pair of twin primes such that p^n and q^n both start with the digits of n for n = 404, 414, 424, 434, 444 and 454. [Hartley]

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