1st PRP for 2^n-418961.

Sieved to P=200G.

Primality testing 2^71370-418961 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 101
Running N+1 test using discriminant 137, base 1+sqrt(137)
Calling N+1 BLS with factored part 0.04% and helper 0.00% (0.13% proof)
2^71370-418961 is Fermat and Lucas PRP! (293.9132s+0.0073s)

To be completed...