99999...48089 (100-digits)

This number is a probable-prime (likely to be a prime but we have not (re-)proven it on this site).

                                            9999999999 9999999999 9999999999
9999999999 9999999999 9999999999 9999999999 9999999999 9999999999 9999648089

The largest holey prime less than a googol containing all of the holey digits only. [Loungrides]