1172803domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) and a(n)+4^k are primes at least for k=1,2,3,4,5.at n=28A049495a(n) and a(n)+4^k are primes at least for k=1,2,3,4,5,6.at n=9A049496Primes p such that p+2^4, p+2^6, p+2^8, p+2^10 and p+2^12 are all primes.at n=28A269259Prime numbersat n=90966