Primality testing 1358^19571-19571^1358 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N-1 test using base 17
Running N+1 test using discriminant 41, base 1+sqrt(41)
Calling N-1 BLS with factored part 0.04% and helper 0.00% (0.12% proof)
1358^19571-19571^1358 is Fermat and Lucas PRP! (202.3104s+0.0013s)

Sieved with xyyxsieve

To be completed...