15627133domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrime Riesel numbers: primes p such that p*2^k - 1 is composite for all positive integers k.at n=27A182296Prime Riesel numbers p that are not Mersenne primes such that 2*p is a noncototient.at n=7A263958Prime numbersat n=1008610