208168381domain: NPropertiesPrimalityPrimeyesAppears in sequencesIntegers k>=3 such that 2^k == 2 (mod k*(k-1)*(k-2)/6).at n=10A337858k-1 for integers k>=4 such that 2^k == 4 (mod k*(k-1)*(k-2)*(k-3)/24).at n=10A337859Prime numbersat n=11505956