10100...00001 (99-digits)

This number is a prime.

                                             101000000 0000000000 0000000000
0000000000 0000000000 0000000000 0000000000 1000000000 0000000000 0000000001

The largest anti-Yarborough prime less than a googol with the least sum of digits, i.e., 10^98+10^96+10^29+1. [Loungrides]