168071domain: NPropertiesPrimalityPrimeyesAppears in sequencesSmallest prime with same leading digits as 7^n.at n=5A068847Primes of the form 2^a * 5^b * 7^c + 1 for positive a, b, c.at n=20A114992a(n) = 10*7^n+1.at n=5A199488Prime numbersat n=15344