318949domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes p such that p-30, p, p+30 are consecutive primes.at n=7A053075Largest prime factor of the semiprime 2^A165767(n)-A165767(n).at n=5A165769Greatest prime dividing 2^n - n for n>=2; a(1) = 1.at n=30A359684Prime numbersat n=27521