Primality testing 25805^28412-28412^25805 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N+1 test using discriminant 7, base 1+sqrt(7)
Calling N-1 BLS with factored part 0.01% and helper 0.00% (0.02% proof)
25805^28412-28412^25805 is Fermat and Lucas PRP! (1278.6198s+0.0038s)

Sieved with xyyxsieve

To be completed...