11111...00001 (100-digits)

This number is a prime.

                                            1111111111 1111111111 1111111111
1111111111 1111111111 1111111111 1111111111 1111111111 1111111111 1101100001

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

The largest prime less than a googol which contains the digits 0 and 1 only. [Gupta]