6588343domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form 2^r*7^s - 1.at n=23A077314a(n) = 8*7^n-1.at n=7A198689Primes of the form 7n^3-1.at n=13A200915Primes of the form m = 7^i + 7^j - 1, where i > j >= 0.at n=8A239717Prime numbersat n=450425