1st PRP for 2^n-495847.

Sieved to P=200G.

Primality testing 2^40055-495847 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 47
Running N-1 test using base 61
Running N+1 test using discriminant 83, base 3+sqrt(83)
Calling N-1 BLS with factored part 0.07% and helper 0.02% (0.23% proof)
2^40055-495847 is Fermat and Lucas PRP! (89.5863s+0.0087s)

To be completed...