Primes p such that sigma(p)/pi(p) is prime.

A269022

Primes p such that sigma(p)/pi(p) is prime.

Terms

    a(0) =2a(1) =3a(2) =5a(3) =7a(4) =29a(5) =349a(6) =359a(7) =3079a(8) =70115921a(9) =514274899a(10) =514277977

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