Primality testing 25017^31148-31148^25017 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 5
Running N-1 test using base 11
Running N+1 test using discriminant 19, base 2+sqrt(19)
Calling N-1 BLS with factored part 0.01% and helper 0.00% (0.03% proof)
25017^31148-31148^25017 is Fermat and Lucas PRP! (899.6497s+0.0033s)

Sieved with xyyxsieve

To be completed...