1st PRP for 2^n-59399.

Sieved to P=200G.

Primality testing 2^156172-59399 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 97
Running N-1 test using base 113
Running N+1 test using discriminant 131, base 1+sqrt(131)
Calling N+1 BLS with factored part 0.01% and helper 0.01% (0.04% proof)
2^156172-59399 is Fermat and Lucas PRP! (3910.9601s+0.0131s)

To be completed...