23222...22223 (27-digits)

This number is a prime.

                                               2322222 2222222222 2222222223

+ The only pseudo-palindromic prime-digit prime less than a googol. It contains 23 2's between two 23's. [Loungrides]

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell