189969337domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes that are congruent to 1 mod n, where n is the index of the prime.at n=19A048891Primes p that are congruent to 1 mod 2*k, where k = primepi(p) is the index of the prime.at n=13A360277Prime numbersat n=10553852