11111...11111 (317-digits)

This number is a prime.

                                    1111111 1111111111 1111111111 1111111111
1111111111 1111111111 1111111111 1111111111 1111111111 1111111111 1111111111
1111111111 1111111111 1111111111 1111111111 1111111111 1111111111 1111111111
1111111111 1111111111 1111111111 1111111111 1111111111 1111111111 1111111111
1111111111 1111111111 1111111111 1111111111 1111111111 1111111111 1111111111

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

+ (10^317-1)/9 is the fourth repunit prime. Note that it is prime in base 12 as well as in base 10. [Dobb]

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