Primes p such that p divides 10^n-1, p is the largest prime producing decimal fraction period n and p is not the largest prime dividing 10^n-1.

A081317

Primes p such that p divides 10^n-1, p is the largest prime producing decimal fraction period n and p is not the largest prime dividing 10^n-1.

Terms

    a(0) =13a(1) =52579a(2) =8779a(3) =2161a(4) =69857a(6) =459691a(8) =14175966169a(9) =183411838171a(11) =388847808493

External references