Generalized repunit (base 176)

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(176^13397-1)/175 is 3-PRP! (82.0578s+2.1725s) (2008-11-16, 16h49m UTC)

Additional results:
(176^13397-1)/175 is 2-PRP! (178.1707s+0.0005s)
(176^13397-1)/175 is 5-PRP! (163.4907s+0.0005s)
(176^13397-1)/175 is 7-PRP! (165.0072s+0.0005s)
(176^13397-1)/175 is 11-PRP! (154.2228s+0.0005s)

To be completed...