10000...01001 (27-digits)

This number is a prime.

                                               1000010 0110111111 1011101001

The smallest anti-Yarborough prime formed when each digit of a pandigital prime (80921735641) is replaced by its respective binary representation: 8 = 1000₂, 0, 9 = 1001₂, 2 = 10₂, 1, 7 = 111₂, 3 = 11₂, 5 = 101₂,6 = 110₂, 4 = 100₂, 1. [Beedassy]