34136029domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) = prime(2^n).at n=21A033844Numbers that begin a run of consecutive integers k such that PrimePi(k) divides 2^k.at n=20A073799(8^n)-th prime.at n=7A119773128^n-th prime.at n=3A119781Prime numbersat n=2097152