11111...11111 (101-digits)

This number is a prime.

                                          1 1111111111 1111111111 1111111111
1111111111 1111111410 1411111111 1111111111 1111111111 1111111111 1111111111

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

The smallest palindromic cyclops prime with a length of the first cyclops number. [Marcel]