Primality testing 25647^29818-29818^25647 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N+1 test using discriminant 11, base 1+sqrt(11)
Calling N-1 BLS with factored part 0.01% and helper 0.01% (0.03% proof)
25647^29818-29818^25647 is Fermat and Lucas PRP! (1331.2634s+0.0042s)

Sieved with xyyxsieve

To be completed...