755663domain: NPropertiesPrimalityPrimeyesAppears in sequencesSecond smallest number of complexity n: second smallest number requiring n 1's to build using + and *.at n=40A265360Primes p such that (p-1)/2, (p-2)/3, 2*p+1, 3*p+2 are all prime numbers.at n=16A348307Prime numbersat n=60667