Primality testing (63847^13339-1)/63846 [N-1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 5 Calling Brillhart-Lehmer-Selfridge with factored part 30.00% (63847^13339-1)/63846 is PRP! (267.9711s+0.0006s)
63847_13339.zip
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The output from the KonPom.gp
PARI script is in
KP.txt
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Phi(13338,63847)/44250132909040111 44250132909040111 150969760686901111765615382126111823611347770309523865965707676383140744591003651097363106791688263873837443881701758536270533956628570233636016591238285005660574417018616797528866729689242643136719474718917939769895046815435233818323595479746197373685986557102558929 468656235505204942525912134505837 67540442631824683 9344532133 1091000431 3342223 57331 560702016210831414505537361837366201937056075706283414508681964610736132239 3126061 177337 53357685928000898683832566277071099557909276139 96010380688201268136838818361 1481101867918414171 31878743949500761 87049
Phi(13338,63847)/44250132909040111
(18666 digits): ecpp18666.7z