11222...99999 (100-digits)

This number is a prime.

                                            1122233333 4444444555 5555555566
6666666666 6777777777 7777777788 8888888888 8888899999 9989999999 9999899999

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

The smallest prime using two 1s, three 2s, five 3s, seven 4s, until the nth prime ns (twenty-three 9s). [Marcel]