47392381domain: NPropertiesPrimalityPrimeyesAppears in sequencesGeneralized Gaussian-Mersenne primes (see below).at n=22A207040Largest prime factor of 4^(2*n+1)+1.at n=17A229747Largest prime factor of 2^(2*n+1)-2^(n+1)+1.at n=16A229767Prime numbersat n=2853888