1st PRP for 2^n-174337.

Sieved to P=200G.

Primality testing 2^186003-174337 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 17
Running N+1 test using discriminant 29, base 1+sqrt(29)
Calling N-1 BLS with factored part 0.01% and helper 0.01% (0.04% proof)
2^186003-174337 is Fermat and Lucas PRP! (1099.2369s+0.0002s)

To be completed...