488689domain: NPropertiesPrimalityPrimeyesAppears in sequencesEvery digit of prime and its index contains a loop (only digits 0,4,6,8,9 in prime and its index).at n=17A107625Primes using only the composite digits (4, 6, 8, 9) and all of them.at n=22A157527Primes p such that p-2, p^2-2 and p^3-2 are all prime.at n=39A270972Prime numbersat n=40664