183823domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes with 21 as smallest positive primitive root.at n=25A061333Smallest prime starting a sequence of 4 consecutive odd primes such that the center of the symmetrical gaps is 2n.at n=20A263171Primes 8k + 7 at the end of the maximal gaps in A269519.at n=9A269521Prime numbersat n=16649