./pfgw64 -t a
PFGW Version 3.7.10.64BIT.20150809.x86_Dev [GWNUM 28.7]


***WARNING! file a may have already been fully processed.

Primality testing (2^120788+1)/17 [N-1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 11
Running N-1 test using base 17
(2^120788+1)/17 is PRP! (22.1107s+0.0003s)

To be completed...