32140859domain: NPropertiesPrimalityPrimeyesAppears in sequencesTerms of A161897 that are not in A005385.at n=24A284660Strong pseudo safe-primes: numbers n = 2m+1 with 2^m == +-1 (mod n) and m a strong pseudoprime A001262.at n=7A301643Prime numbersat n=1981953