Primality testing 25507^30000-30000^25507 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 7
Running N-1 test using base 13
Running N-1 test using base 17
Running N-1 test using base 19
Running N-1 test using base 23
Running N+1 test using discriminant 31, base 10+sqrt(31)
Calling N-1 BLS with factored part 0.01% and helper 0.00% (0.02% proof)
25507^30000-30000^25507 is Fermat and Lucas PRP! (2387.9990s+0.0038s)

Sieved with xyyxsieve

To be completed...