368453domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrimes of the form p^2 + 4, where p is prime.at n=29A045637Prime p1 of the form a^b + c^d = p1, where a, b, c, d are primes and a + b + c + d = p2, where p2 (A164076) is also prime.at n=31A164075Prime numbersat n=31418