102911domain: NPropertiesPrimalityPrimeyesAppears in sequencesSophie Germain primes in A154939.at n=37A154941Primes p such that pi(p^2)*pi(q^2) is a square for some prime q < p, where pi(x) denotes the number of primes not exceeding x.at n=20A262700Prime numbersat n=9847