Primality testing 25982^28643-28643^25982 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N+1 test using discriminant 7, base 6+sqrt(7)
Calling N+1 BLS with factored part 0.01% and helper 0.00% (0.03% proof)
25982^28643-28643^25982 is Fermat and Lucas PRP! (1186.4599s+0.0039s)

Sieved with xyyxsieve

To be completed...