Primality testing 25493^27902-27902^25493 [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 0.00% and helper 0.00% (0.01% proof)
25493^27902-27902^25493 is Fermat and Lucas PRP! (1029.1926s+0.0049s)

Sieved with xyyxsieve

To be completed...