77777...77777 (79-digits)

This number is a prime.

                                                                   777777777
7777777777 7777777777 7777777777 8777777777 7777777777 7777777777 7777777777

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

The largest near-repdigit palindromic wing prime, less than a googol, containing 7's. [Loungrides]