217057domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes from merging of 6 successive digits in decimal expansion of the Golden Ratio; (1+sqrt(5))/2.at n=20A103808Primes p such that 2p - 1, 3p - 2, (p + 1)/2, and (p + 2)/3 are also prime.at n=10A386540Prime numbersat n=19368