304651domain: NPropertiesPrimalityPrimeyesAppears in sequencesGreatest prime factor of 2*n^4 + 1.at n=25A140538Primes p such that q=2*p^2-1, r=2*p*q-1 and 2*p*r-1 are also prime.at n=11A224991Prime numbersat n=26378