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Old 2022-01-13, 19:39   #782
James Heinrich
 
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"James Heinrich"
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There is a new report showing TF results that claim no-factor for a certain range when there is a factor in that range:
https://www.mersenne.ca/tfmissed.php

The NF run may have happened before or after the factor discovery. In about 1/3 of the cases the NF run happens within an hour of factor discovery, and might possibly be a poorly-recorded effort to show that the bitrange was completed even after finding the factor (this is not confirmed, maybe one of the users listed wants to weigh in on how they got so many of these kind of results).
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Old 2022-01-13, 20:22   #783
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Quote:
Originally Posted by James Heinrich View Post
might possibly be a poorly-recorded effort to show that the bitrange was completed even after finding the factor (this is not confirmed, maybe one of the users listed wants to weigh in on how they got so many of these kind of results).

Exactly this; One reason mfaktc doesn't produce a NF result if it finds a composite factor (and the server rejects the composite factor result) so I manually produced many NF results for ranges I had completed but would otherwise be ignored
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Old 2022-01-14, 17:11   #784
mathwiz
 
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This is a bit of a nitpick, but can this page: https://www.mersenne.ca/userfactors/any/1/bits (and related) have an "snfs" category? Factors like those found by Joppe Bos, Thorsten Kleinjung, Arjen Lenstra, Peter Montgomery were found by SNFS, not ECM.

https://eprint.iacr.org/2014/653.pdf
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Old 2022-01-15, 16:31   #785
James Heinrich
 
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Quote:
Originally Posted by mathwiz View Post
Factors like those found by Joppe Bos, Thorsten Kleinjung, Arjen Lenstra, Peter Montgomery were found by SNFS, not ECM.
If you want to give me an explicit list of the factors you mean (by exponent-bits is fine to save space) I can edit those few to show snfs.
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Old 2022-01-15, 19:57   #786
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Quote:
Originally Posted by James Heinrich View Post
If you want to give me an explicit list of the factors you mean (by exponent-bits is fine to save space) I can edit those few to show snfs.

M991: mersenneforum.org users, see https://www.mersenneforum.org/showth...290#post404290
M1061: Greg Childers, see M1061.pdf


Might also be good to give credit to finders instead of listing them as "anonymous"
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Old 2022-01-15, 20:14   #787
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Quote:
Originally Posted by James Heinrich View Post
If you want to give me an explicit list of the factors you mean (by exponent-bits is fine to save space) I can edit those few to show snfs.
And for the paper mathwiz was referencing, the exponents are
1009,1093,1109,1117,1123,1129,1151,1153,1171,1193
as listed on pages 16 to 17.

Last fiddled with by nordi on 2022-01-15 at 20:20
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Old 2022-01-15, 21:19   #788
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Quote:
Originally Posted by nordi View Post
And for the paper mathwiz was referencing, the exponents are
1009,1093,1109,1117,1123,1129,1151,1153,1171,1193
as listed on pages 16 to 17.
Thanks, it wasn't obvious to me what the linked PDF was talking about. I have added those.
Quote:
Originally Posted by nordi View Post
M991: mersenneforum.org users, see https://www.mersenneforum.org/showth...290#post404290
M1061: Greg Childers, see M1061.pdf
And those as well.
Quote:
Originally Posted by nordi View Post
Might also be good to give credit to finders instead of listing them as "anonymous"
I can only credit what I know. If you see something that's not credited as it should be, please tell me.
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