215399domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form 8*k-1 such that 4*k-1, 16*k-1 and 32*k-1 are also primes.at n=16A101796Double-safe primes which are also double-Sophie Germain primes.at n=4A162019Prime numbersat n=19242