244199domain: 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=18A101796Primes of the form 5n^2 - 6.at n=18A201787Prime numbersat n=21561