Prime p2 of the sequence A164063: a^b - c^d = p1 (A164063), where a, b, c, d are primes and a + b + c + d = p2, where p2 is prime and conc(abcd) = p3 (concatenation of a, b, c , d) is also prime (A164065).
17, 11, 47, 43, 53, 29, 2
1 seqfan posts
Tue Apr 27 19:27:35 CEST 2010 [seqfan] Sequences with a^b +/- c^d