1st PRP for 2^n-30283.

Sieved to P=200G.

Primality testing 2^53857-30283 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 199
Running N-1 test using base 227
Running N+1 test using discriminant 241, base 3+sqrt(241)
Running N+1 test using discriminant 241, base 5+sqrt(241)
Calling N-1 BLS with factored part 0.09% and helper 0.02% (0.30% proof)
2^53857-30283 is Fermat and Lucas PRP! (397.9544s+0.0066s)

To be completed...