1st PRP for 2^n-410677.

Sieved to P=200G.

Primality testing 2^38383-410677 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 11
Running N-1 test using base 23
Running N+1 test using discriminant 31, base 1+sqrt(31)
Calling N+1 BLS with factored part 0.07% and helper 0.03% (0.24% proof)
2^38383-410677 is Fermat and Lucas PRP! (95.0692s+0.0058s)

To be completed...