1st PRP for 2^n-440519.

Sieved to P=200G.

Primality testing 2^143420-440519 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 41
Running N+1 test using discriminant 59, base 4+sqrt(59)
Calling N-1 BLS with factored part 0.05% and helper 0.02% (0.16% proof)
2^143420-440519 is Fermat and Lucas PRP! (2374.0119s+0.0079s)

To be completed...