Prime 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).
3253, 24517, 78157, 366103, 548677, 705097, 1030429, 1229257, 5735467
1 seqfan posts
Tue Apr 27 19:27:35 CEST 2010 [seqfan] Sequences with a^b +/- c^d