Smallest n-digit prime containing only digits 3 and 7, or 0 if no such prime exists.

A036942

Smallest n-digit prime containing only digits 3 and 7, or 0 if no such prime exists.

Terms

    a(0) =3a(1) =37a(2) =337a(3) =3373a(4) =33377a(5) =333337a(6) =3333373a(7) =33333373a(8) =333337777a(9) =3333733373a(10) =33333333377a(11) =333333733333

External references