Generalized repunit (base -171)

Open WinPFGW Version 1.30 - PFGW Version 1.2.0 for Windows [FFT v23.8]

(171^4967+1)/172 is 3-PRP! (9.1982s+0.2365s) (2008-11-15, 07h39m UTC)

Additional results:
(171^4967+1)/172 is 2-PRP! (11.7954s+0.0004s)
(171^4967+1)/172 is 5-PRP! (12.1925s+0.0003s)
(171^4967+1)/172 is 7-PRP! (11.7506s+0.0003s)
(171^4967+1)/172 is 11-PRP! (12.5021s+0.0003s)

To be completed...