99997...11111 (40-digits)

This number is a prime.

                                 9999777777 7766555444 3333333322 2111111111

+ Greatest integer that consists of exactly the digits (with multiplicity) of the first 22 primes. Not only is this number prime, but also an emirp. [Chandler]

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