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Old 2007-05-18, 12:23   #7
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Oct 2004

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Originally Posted by akruppa View Post
There was a case where a prime factor bigger than the cofactor was found and made the #1 spot on Paul Zimmermann's TOP10 list of that year, see

There was a bit of discussion following the discovery about what is and what isn't an ECM champion, and as a result, Brent introduced the r / r' > 2.2 rule.

Yes, but this factor was found with B1 ~ 3.9M (!) (just above p40-optimal), so I guess it was propably not over-ecm'd.

What if somebody would find a lucky p70 as a factor of a c140 with a few curves at B1 <= 3M? Would this not be considered an ECM-record?

Last fiddled with by Andi47 on 2007-05-18 at 12:26
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