745988807domain: NPropertiesPrimalityPrimeyesAppears in sequencesSmallest prime factor of composite Mersenne numbers: lpf(2^p-1) where 2^p-1 is composite and p is prime.at n=17A136030Primes p such that gcd(ord_p(2), ord_p(6)) = 1.at n=12A383467Prime numbersat n=38507138