20220113, 19:39  #782 
"James Heinrich"
May 2004
exNorthern Ontario
2·17·109 Posts 
There is a new report showing TF results that claim nofactor 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 poorlyrecorded 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). 
20220113, 20:22  #783  
"Seth"
Apr 2019
2^{4}×3^{3} Posts 
Quote:
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 

20220114, 17:11  #784 
Mar 2019
404_{8} Posts 
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 
20220115, 16:31  #785 
"James Heinrich"
May 2004
exNorthern Ontario
7172_{8} Posts 

20220115, 19:57  #786  
Dec 2016
3^{2}·13 Posts 
Quote:
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" 

20220115, 20:14  #787  
Dec 2016
3^{2}·13 Posts 
Quote:
1009,1093,1109,1117,1123,1129,1151,1153,1171,1193 as listed on pages 16 to 17. Last fiddled with by nordi on 20220115 at 20:20 

20220115, 21:19  #788  
"James Heinrich"
May 2004
exNorthern Ontario
111001111010_{2} Posts 
Quote:
Quote:


20220120, 07:05  #789 
"University student"
May 2021
Beijing, China
2×5^{3} Posts 
Suggestion:
Show "MISSED FACTOR!" in P1 results too, as in https://www.mersenne.ca/exponent/1014197 (shown in TF). Some are not really "MISSED FACTORs", because P1 can be run on the cofactor. But if it's a factor not previously found, it's a missed factor. Recently I found 4 missed factors in 13.2M (missed by the 2001 anonymous P1 results). Last fiddled with by Zhangrc on 20220120 at 07:05 
20220120, 07:49  #790 
Romulan Interpreter
"name field"
Jun 2011
Thailand
7×1,423 Posts 
Kind of difficult to make, from the "organizational" point of view, one table shows who attempted the factorization, therefore missed the factor, the other one shows who found the factor. So, if you want to modify the second table, the text should be more like "missed by ..." and shows the name of who missed it. Honestly, this would be too much trouble. Let the things as they are, the addition of the nfs class of factors is already a very good improvement.
My two cents. 
20220120, 15:43  #791 
"Curtis"
Feb 2005
Riverside, CA
2^{2}×1,319 Posts 
I suspect you misunderstand how P1 bounds work. Just because you find one doesn't mean the previous P1 run missed it the way that TF report says "missed factor". Can you give us an example of an exponent where you think the original P1 work missed the factor, and the bounds for the previous P1? It's more likely you found factors with bigger bounds than all 4 of your finds would have been found by the old bounds.

20220120, 15:46  #792  
"James Heinrich"
May 2004
exNorthern Ontario
2·17·109 Posts 
Quote:


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