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Old 2003-06-23, 01:59   #10
Sep 2002

26210 Posts

Yes I use several method like 1 or 7 mod 8 so we remove 3 or 5
and we also remove 1 mod 12.
I`ll try and see if it`s faster without checking for primality.
but my factoring of F-1 is not very fast since I have to go up to 79.3M
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