99999...99089 (100-digits)

This number is a prime.

                                            9999999999 9999999999 9999999999
9999999999 9999999999 9999999999 9999999999 9999999999 9999999999 9999999089

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

The largest prime less than a googol whose digits contain circles, i.e., using only the digits 0, 6, 8, 9. [Patterson and Honaker]