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Old 2009-11-14, 19:57   #5
Batalov's Avatar
Mar 2008

9,431 Posts

Originally Posted by R.D. Silverman View Post
Kleinjung just found a p55 factor of M1079.

I am guessing that they might have been doing ECM pre-testing
prior to doing GNFS on the number.
It easier with SNFS (diff.299, because M83 | M1079, giving a convenient sextic, with a gnfs/snfs ratio = 0.72).
Furthermore, it wouldn't have been a record SNFS, neither. So, the particular interest to this number is unclear. Unless it means that with a clever 6-degree gnfs poly, this rule of thumb ratio shifts?
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