2979043domain: NPropertiesPrimalityPrimeyesAppears in sequencesa(n) and a(n)+4^k are primes at least for k=1,2,3,4,5,6.at n=21A049496a(n) and a(n)+4^k are primes at least for k=1,2,3,4,5,6,7.at n=8A049497Primes p such that p+2^4, p+2^6, p+2^8, p+2^10, p+2^12 and p+2^14 are all primes.at n=18A269859Prime numbersat n=215390