Primality testing 25292^28361-28361^25292 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N-1 test using base 11
Running N-1 test using base 23
Running N+1 test using discriminant 37, base 1+sqrt(37)
Calling N-1 BLS with factored part 0.01% and helper 0.00% (0.02% proof)
25292^28361-28361^25292 is Fermat and Lucas PRP! (964.1560s+0.0043s)

Sieved with xyyxsieve

To be completed...