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-   -   norm vs size (https://www.mersenneforum.org/showthread.php?t=20482)

chris2be8 2015-09-11 16:00

norm vs size
 
Hello,

I've been comparing what msieve says about a poly during GNFS poly selection and what it says during -nc. Eg:
[code] # norm 1.023739e-12 alpha -6.751675 e 5.557e-11 rroots 5
skew 942118.35, size 8.466e-13, alpha -6.752, combined = 5.557e-11 rroots = 5 [/code] alpha, e/combined and rroots match, but does the norm relate to the size score? The ones I've looked at norm is a bit larger than the size, but I don't know if that's always true.

Chris

jasonp 2015-09-13 02:24

The two size-based scores are calculated differently; the first score above accounts for the skew, while the second one has a more complex definition and is independent of skew. For the first one, smaller is better, but for the second one larger is better.


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