270840151domain: NPropertiesPrimalityPrimeyesAppears in sequencesPrime p1 of the form a^b + c^d = p1, where a, b, c, d are primes and a + b + c + d = p2, where p2 (A164078) is prime and conc(abcd) = p3 (concatenation of a, b, c , d) is also prime (A164079).at n=16A164077Prime numbersat n=14754671