71014331domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form 9*(p^4)-2 or 9*(p^4)+2, arising in Paley-Hadamard difference sets.at n=8A157430Primes p such that tau(p - 1) = tau(p - 2) + 1, where tau(k) is the number of divisors of k (A000005).at n=26A347078Prime numbersat n=4174177