1st PRP for 2^n-486749.

Sieved to P=200G.

Primality testing 2^128664-486749 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 29
Running N+1 test using discriminant 41, base 1+sqrt(41)
Calling N+1 BLS with factored part 0.00% and helper 0.00% (0.01% proof)
2^128664-486749 is Fermat and Lucas PRP! (1717.1818s+0.0060s)

To be completed...