1st PRP for 2^n-115259.

Sieved to P=200G.

Primality testing 2^56776-115259 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 251
Running N+1 test using discriminant 13, base 1+sqrt(13)
Calling N-1 BLS with factored part 0.04% and helper 0.00% (0.14% proof)
2^56776-115259 is Fermat and Lucas PRP! (191.6014s+0.0067s)

To be completed...