Primality testing 25218^37819-37819^25218 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 11
Running N+1 test using discriminant 17, base 1+sqrt(17)
Calling N+1 BLS with factored part 0.00% and helper 0.00% (0.01% proof)
25218^37819-37819^25218 is Fermat and Lucas PRP! (1159.8179s+0.0035s)

Sieved with xyyxsieve

To be completed...