639757domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes for which the eight closest primes are smaller.at n=27A075050prime(k) for those k where floor((2*(prime(k+1)-prime(k))*PrimePi(k) mod (8*k))/k) = m with m = 15.at n=21A109569Prime numbersat n=52061