1st PRP for 2^n-230407.

Sieved to P=200G.

Primality testing 2^170531-230407 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 101
Running N+1 test using discriminant 167, base 1+sqrt(167)
Calling N-1 BLS with factored part 0.02% and helper 0.01% (0.06% proof)
2^170531-230407 is Fermat and Lucas PRP! (2700.7007s+0.0060s)

To be completed...