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Old 2007-05-06, 19:59   #1
bsquared
 
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"Ben"
Feb 2007

E4E16 Posts
Default interesting P-1 result

I just had a rather interesting result from a P-1 factorization that I thought I'd share... apologies if this has been found before, although a google seach on the factors didn't turn up any hits.

Using B1=10^7 and B2=10^9 on 315^76-1 I was surprised to find in my logfile a C90!

Using msieve, the C90 = P45*P45 = 929423050985198068638864635036910757233824911*
935342943029689776082424282393833755687543541

P-1 =
2.3.3.5.7.13.13.19.31.157.7561.7993.8101.43867.98911.2786221.15949441

Q-1 =
2.2.3.3.5.7.13.13.19.31.79.7561.7993.8101.43867.98911.2786221.15949441

which differ by a factor of 158/157

are such things 'common'?

- ben
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