Generalized repunit (base -159)

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(159^7457+1)/160 is 3-PRP! (25.1759s+0.5784s) (2008-11-08, 20h59m UTC)

Additional results:
(159^7457+1)/160 is 2-PRP! (50.5870s+0.0006s)
(159^7457+1)/160 is 5-PRP! (44.2658s+0.0005s)
(159^7457+1)/160 is 7-PRP! (40.0383s+0.0005s)
(159^7457+1)/160 is 11-PRP! (35.8164s+0.0005s)

To be completed...