85297domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes with 15 as smallest positive primitive root.at n=27A061328Numbers k such that 33*10^k + 7 is prime.at n=33A275285Numerator of the sum of the reciprocals of all square divisors of all positive integers <= n.at n=43A384817Prime numbersat n=8304