175079domain: 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=13A101796Numbers m such that m-2, m-1, m+1, m+2 cannot all be represented in the form x*y + x + y for values x, y with x >= y > 1.at n=32A256386Prime numbersat n=15923