1st PRP for 2^n-90523.

Sieved to P=200G.

Primality testing 2^67401-90523 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 89
Running N+1 test using discriminant 131, base 1+sqrt(131)
Calling N-1 BLS with factored part 0.05% and helper 0.05% (0.21% proof)
2^67401-90523 is Fermat and Lucas PRP! (317.3671s+0.0131s)

To be completed...