1st PRP for 2^n-278713.

Sieved to P=200G.

Primality testing 2^159001-278713 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 109
Running N-1 test using base 127
Running N+1 test using discriminant 137, base 1+sqrt(137)
Calling N+1 BLS with factored part 0.01% and helper 0.01% (0.06% proof)
2^159001-278713 is Fermat and Lucas PRP! (3321.6465s+0.0079s)

To be completed...