A077805 Smallest prime factor of numbers containing in their decimal representation only the digits 0 and 1.

1, 2, 11, 2, 101, 2, 3, 2, 7, 2, 3, 2, 3, 2, 11, 2, 73, 2, 3, 2, 3, 2, 10111, 2, 3, 2, 7, 2, 17, 2, 41, 2, 11, 2, 3, 2, 3, 2, 11, 2, 3, 2, 83, 2, 7, 2, 101111, 2, 3, 2, 11, 2, 23, 2, 149, 2, 11, 2, 31, 2, 241, 2, 3, 2, 101, 2, 3, 2, 3, 2, 7, 2, 3, 2, 11, 2, 971, 2, 181, 2, 3, 2, 31, 2, 73, 2