1st PRP for 2^n-270551.

Sieved to P=200G.

Primality testing 2^169706-270551 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 139
Running N+1 test using discriminant 181, base 1+sqrt(181)
Calling N+1 BLS with factored part 0.01% and helper 0.00% (0.02% proof)
2^169706-270551 is Fermat and Lucas PRP! (2697.1180s+0.0058s)

To be completed...