Primality testing 570^20251-20251^570 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 11
Running N+1 test using discriminant 41, base 1+sqrt(41)
Calling N+1 BLS with factored part 0.02% and helper 0.00% (0.06% proof)
570^20251-20251^570 is Fermat and Lucas PRP! (107.9467s+0.0018s)

Sieved with xyyxsieve

To be completed...