1st PRP for 2^n-339907.

Sieved to P=200G.

Primality testing 2^102155-339907 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 2
Running N-1 test using base 7
Running N+1 test using discriminant 37, base 3+sqrt(37)
Calling N+1 BLS with factored part 0.04% and helper 0.02% (0.15% proof)
2^102155-339907 is Fermat and Lucas PRP! (593.3674s+0.0050s)

To be completed...