11111161111111111111111

This number is a prime.

                                                   111 1116111111 1111111111

Just showing those entries submitted by 'Loungrides': (Click here to show all)

+ The only near-repunit prime whose sum and product of digits are perfect numbers. [Loungrides]

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