167197domain: NPropertiesPrimalityPrimeyesAppears in sequencesShifts left 2 places under "DHK" (bracelet, identity, unlabeled) transform.at n=21A032258Primes 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=8A235935Prime numbersat n=15277