60775313domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form (k^4 + 1)/2.at n=18A096170a(n) is the least prime of the form (3^r*5^s*7^t + 1)/2, r, s, t > 0, r + s + t = n.at n=9A337428Prime numbersat n=3605448