20220401, 05:32  #1 
"刀比日"
May 2018
100111110_{2} Posts 
Missed Factors (TF)
This thread is intended to collect information about factors obtained with trial factoring (TF) that have been previously missed due to:
1) Incomplete TF scans for small factors; 2) Faulty TF hardware/software; 3) Fake TF reports; etc. An example is M618033947 for which the 68bit factor 276413495291788087169 was found. It was not previously in the GIMPS database and 0.3866 GHzDays were given for finding it. Note that zero (0.0000) GHzDays are given for the TF verification of a known factor. 
20220401, 06:10  #3  
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
5^{2}×421 Posts 
Quote:
34153055801363324180057 was reported on 20160614 by Anonymous and 20220121 by LordJulius 20211228 alpertron FPM1 Factor: 7170112396664438582504527 / (P1, B1=1000000, B2=10164924) 20211228 Yzzyx FPM1 Factor: 7170112396664438582504527 / (P1, B1=1000000, B2=10164924) 20211226 alpertron FPM1 Factor: 10702385060027676180416983 / (P1, B1=1000000, B2=1000000) 

20220401, 06:15  #4  
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
5^{2}×421 Posts 
Quote:


20220401, 06:22  #5 
"刀比日"
May 2018
2·3·53 Posts 

20220401, 09:05  #6  
"Jacob"
Sep 2006
Brussels, Belgium
7^{2}·37 Posts 
Quote:
Factor: 12965740712769703 / TF: 153 Factor: 37915764094923857 / TF: 153 Factor: 37915764094923857 / TF: 5354 Factor: 37915764094923857 / TF: 5455 The first factor is 53,5 bits the second 55,0 bits. How can a 55 bits factor be found trial factoring from 1 to 53 bits ? I suppose those where tests ? As for some no factor results, they may be the result of finishing a bit level even after a factor was found, there used to be an option to do that, but now I can only find such a setting about ECM in undoc.txt. Last fiddled with by S485122 on 20220401 at 09:28 Reason: stupid formatting by the "smart" software the code tag is not supposed to change the content 

20220401, 09:19  #7 
Jun 2003
5×29×37 Posts 

20220401, 09:26  #8  
"刀比日"
May 2018
2·3·53 Posts 
Quote:
What I meant was that the user Anton Repko missed 3 factors in their TF 7475, 8283, and 8384 tests. Last fiddled with by Dobri on 20220401 at 09:28 

20220401, 10:29  #9 
Einyen
Dec 2003
Denmark
3,313 Posts 
Yes, that is a bit strange:
Code:
20220307 Dobri F Factor: 10702385060027676180416983 / TF: 8384 20220223 Dobri F Factor: 7170112396664438582504527 / TF: 8283 . 20220121 LordJulius F Factor: 34153055801363324180057 / TF: 7475 . 20220101 Anton Repko NF no factor from 2^82 to 2^83 20220101 Anton Repko NF no factor from 2^74 to 2^75 . 20211230 Anton Repko NF no factor from 2^83 to 2^84 
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