Smallest n-digit prime containing only digits 1 or 2 or -1 if no such prime exists.

A036229

Smallest n-digit prime containing only digits 1 or 2 or -1 if no such prime exists.

Terms

    a(0) =2a(1) =11a(2) =211a(3) =2111a(4) =12211a(5) =111121a(6) =1111211a(7) =11221211a(8) =111112121a(9) =1111111121a(10) =11111121121a(11) =111111211111

External references