1st PRP for 2^n-237157.

Sieved to P=200G.

Primality testing 2^185151-237157 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N-1 test using base 7
Running N+1 test using discriminant 19, base 9+sqrt(19)
Calling N-1 BLS with factored part 0.01% and helper 0.00% (0.03% proof)
2^185151-237157 is Fermat and Lucas PRP! (1575.0669s+0.0002s)

To be completed...