11116666111

This number is a prime.

                                                                1 1116666111

+ The only prime of form aaaabbbbaaa. Note that the sum of its digits, (31), is an emirp and its length, (11), is a palindromic prime. [Loungrides]

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