1st PRP for 2^n-199739.

Sieved to P=200G.

Primality testing 2^125152-199739 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 17
Running N+1 test using discriminant 31, base 1+sqrt(31)
Calling N+1 BLS with factored part 0.03% and helper 0.02% (0.11% proof)
2^125152-199739 is Fermat and Lucas PRP! (1652.2647s+0.0091s)

To be completed...