242009domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p such that q-p = 48, where q is the next prime after p.at n=28A134123Primes containing the digits (2,0,0,9) in that order.at n=16A197114Primes of the form 5n^2 + 9.at n=32A201487Prime numbersat n=21393