973813domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p with f(p), f(f(p)), f(f(f(p))), f(f(f(f(p)))) all prime, where f(n) = prime(n) - n + 1.at n=26A235935Numbers k such that k divides A340740(k).at n=16A342503Prime numbersat n=76633