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Old 2020-08-26, 21:10   #6
bsquared
 
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"Ben"
Feb 2007

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Quote:
Originally Posted by Ensigm View Post
I see, thank you. For a given number, at what level shall we stop using ECM and switch to NFS?
If your interest is limited to factoring Mersenne numbers, then the practical advice is probably: never. Unless you represent a small government or large research collaboration? Only they have the resources needed to approach the smallest unfactored Mersenne number by NFS.

If you are asking in general then Batalov and VBCurtis have good advice.
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