71717...11777 (100-digits)

This number is a prime.

                                            7171711711 1711111711 1111117111
1111111111 7111111111 1111111111 1171111111 1111111111 1111111111 1111111777

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

Prime number containing runs of ones with lengths patterned after the Fibonacci number series in-between sevens. [Barnes]