PFGW Fermat Prp b=3,7 and BLS test :
PFGW Version 3.7.10.64BIT.20150809.x86_Dev [GWNUM 28.7]
Primality testing 2^525667-525667^2 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N+1 test using discriminant 17, base 1+sqrt(17)
Calling N-1 BLS with factored part 0.01% and helper 0.00% (0.03% proof)

2^525667-525667^2 is Fermat and Lucas PRP! (2477.5929s+0.0004s)

To be completed...