68501domain: NPropertiesPrimalityPrimeyesAppears in sequencesPenta-Primes. Prime Numbers n as a Sum of 5 consecutive prime numbers (four twin primes and single prime number in between) are primes.at n=15A138397Primes that are the sum of the squares of three integers that form an arithmetic sequence with difference 7.at n=18A227994Prime numbersat n=6812