104124649domain: NPropertiesPrimalityPrimeyesAppears in sequencesSmallest prime factor of (2^prime(n) + 1) / 3.at n=27A360475a(n) is the least prime factor (> 3) in the factorization of 2^(2*prime(n))-1.at n=28A363673Prime numbersat n=5985273