5456897domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form 81*k^2 - 72*k + 17.at n=25A154276Primes p such that tau(p - 1) = tau(p - 2) + 1, where tau(k) is the number of divisors of k (A000005).at n=14A347078Prime numbersat n=378028