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Old 2015-04-27, 16:15   #56
James Heinrich
 
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Quote:
Originally Posted by Madpoo View Post
where result_type=pm1 factor and message like '%TF%'
If you assume that everything submitted from mfaktc and mfatkto are TF that should present fewer false matches than "TF", something like LIKE 'M%mfakt%'
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Old 2015-04-27, 16:31   #57
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Quote:
Originally Posted by Madpoo View Post
If these results only came from manual clients and they all start with "Mxxx has a factor" then the LIKE clause could be LIKE 'M%TF%' which is actually a lot faster.
At least based on that assumption (they start with "Mxxx") there are 1220 such entries incorrectly listed as F-PM1 instead of factored by TF

There are 21 incorrectly listed as F-ECM instead of TF.

Drat... I say "drat" because although those can be fixed, I just did that thing to dump the result messages to XML files and if any data cleanup is done I'd need to regenerate it so it has the corrected data. Maybe I can spit out a list of dates where data changed and only re-run the XML dump for those rather than every day going back to 2007. :)

EDIT: I found a few more by looking for "LIKE 'U%TF%'" for entries that have "UID:" in the result text. 2 more ECM and 260 more PM1.
EDIT 2: Never mind ... those other ones just happened to have "TF" in the user or computer name. :) Obviously before any were corrected I'd eyeball them to make sure the LIKE didn't match spurious entries, or refine it to 'M%[TF:%' just to be sure.

Last fiddled with by Madpoo on 2015-04-27 at 16:44
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Old 2015-07-09, 21:30   #58
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You could say this was missed by P-1:

exponent 12168509
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Old 2015-11-25, 09:20   #59
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Quote:
Originally Posted by tha View Post
You could say this was missed by P-1:

exponent 12168509
Another one for the lower left corner on mersenne.ca graphs:

15746897 Factored 583334550078615316001
with k = 24×53×23×313×433×2 971
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Old 2020-08-01, 21:28   #60
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I mentioned here that I found a factor that should have been found by a previous P-1 effort.

After some sleuthing, I found the current thread and a few other interesting details.

There are (so far) 8 factors that should have been found by P-1 in the 14.0M to 14.1M range. Five of those 8 failed factoring efforts were reported on December 22, 2001; four of them by ANONYMOUS. Now, it should be noted that apparently results were only imported to the server/database on certain days back then. There were a few results on December 8th, a ton or results on December 22, and then more results on Jan 2, 2002. No results on the intermediate days.

It would be nice if there were a way to query the database for all NF-PM1 results submitted by ANONYMOUS on 12-22-2001. If anyone could help me with that, I'd be grateful.

Given the information in this thread about the state of the server/database then, I'm not surprised there are a number of bad prior P-1 attempts to be uncovered. I'll also note that the whatsnew.txt file in mprime/Prime95 distros mentions P-1 bug fixes in versions 22.11, 22.12 and 24.11.
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Old 2020-08-01, 21:42   #61
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Quote:
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It would be nice if there were a way to query the database for all NF-PM1 results submitted by ANONYMOUS on 12-22-2001. If anyone could help me with that, I'd be grateful.
More than you'd think, 7449 to be exact. Attached for your amusement.
Attached Files
File Type: gz pm1nf_20011222.txt.gz (30.3 KB, 11 views)
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Old 2020-08-01, 21:55   #62
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Thank you.

Wow, that seems weird. I will be redoing all of the P-1 in the 14.0M to 14.1M range with much larger bounds, so we'll see if I find any more missed P-1 factors. I'll move the exponents in this list to the front of my queue.
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Old 2020-08-05, 14:16   #63
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Here's another with the same characteristics:

M14086463 has a factor: 7227647060086790517448231 (P-1, B1=7000000)

7227647060086790517448230 = 2 × 3 × 5 × 53 × 10009 × 143527 × 224633 × 14 086463

Anonymous submitted NF-PM1 result on 12-22-2001 with B1=155000, B2=1860000.

Last fiddled with by masser on 2020-08-05 at 14:18
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Old 2020-08-05, 19:03   #64
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Quote:
Originally Posted by masser View Post
Here's another with the same characteristics:

M14086463 has a factor: 7227647060086790517448231 (P-1, B1=7000000)

7227647060086790517448230 = 2 × 3 × 5 × 53 × 10009 × 143527 × 224633 × 14 086463

Anonymous submitted NF-PM1 result on 12-22-2001 with B1=155000, B2=1860000.
What was the old software? (is it a bug in the software or a hardware problem? or, unlikely, a fake result)

What software are you using now, that is finding the factors?
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Old 2020-08-05, 20:38   #65
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Quote:
Originally Posted by preda View Post
What was the old software? (is it a bug in the software or a hardware problem? or, unlikely, a fake result)

What software are you using now, that is finding the factors?
I would assume the old software was a version of Prime95/mprime from circa 2001.

I am currently using mprime to find factors.

My hypothesis is that Anonymous had a compute farm with one or two bad devices. A large year-end compilation of results was submitted on 12-22-2001 and we are now (with a tertiary factor search) discovering some of the submissions were faulty.
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Old 2020-08-05, 21:11   #66
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Prime95 P-1 in 2001 was not bug-free
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