PFGW Version 3.7.7.64BIT.20130722.x86_Dev [GWNUM 27.11]
Primality testing 21^128327-20^128327 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 2
Running N-1 test using base 11
Running N-1 test using base 19
Running N+1 test using discriminant 29, base 16+sqrt(29)
Calling N+1 BLS with factored part 0.01% and helper 0.01% (0.04% proof) 21^128327-20^128327 is Fermat and Lucas PRP! (12726.1273s+0.0028s)
To be completed...