303551domain: NPropertiesPrimalityPrimeyesAppears in sequencesSmallest primitive prime factor of 12^n-1.at n=24A252170Numbers X such that X^2 + Y^2 = 5^(2*k) + 1 and X > Y > 0 and k is the quintal digit length of X-1.at n=14A369769Prime numbersat n=26285