111111110111011111111
This number is a prime.
1 1111111011 1011111111
A palindromic prime formed by sandwiching two zeros between the digits of a repunit prime. [Silva]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell
This number is a prime.
1 1111111011 1011111111
A palindromic prime formed by sandwiching two zeros between the digits of a repunit prime. [Silva]