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Old 2020-09-27, 23:53   #56
gd_barnes
 
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Reviving a very old thread...

I am starting a double check effort for all k<300 for n<=1M using the well sieved files provided here. I know that most k were at least double checked to n=260K nearly a decade ago but I have not seen anything more on here about such efforts. Effectively I will be triple checking n<260K but that part of the effort is fairly small with today's processors so I'm including all of it.

If anyone has any update on such an effort let me know.

It will be a slow process that will likely take several months. I will dedicate 16 cores to it on and off.

Last fiddled with by gd_barnes on 2020-09-27 at 23:54
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Old 2020-10-10, 05:54   #57
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I have completed double checking k<10 (not k=1) to n=1M. No problems were found. Below are links to the primes and results. I will continue to add files to the links as I progress upwards.

http://www.noprimeleftbehind.net/pri...ase2-0M-1M.zip
http://www.noprimeleftbehind.net/res...ase2-0M-1M.zip
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Old 2020-10-10, 22:12   #58
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Quote:
Originally Posted by gd_barnes View Post
Reviving a very old thread...

I am starting a double check effort for all k<300 for n<=1M using the well sieved files provided here. I know that most k were at least double checked to n=260K nearly a decade ago but I have not seen anything more on here about such efforts. Effectively I will be triple checking n<260K but that part of the effort is fairly small with today's processors so I'm including all of it.

If anyone has any update on such an effort let me know.
k=39 was double checked to at least n=1.263M. Other searchers originally tested that k for n <= 1.263M (https://www.mersenneforum.org/showpo...&postcount=157), and when I took it over, I double checked everything starting from n=1 and posted the residues at: https://www.mersenneforum.org/showpo...&postcount=953
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Old 2020-10-10, 23:40   #59
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Good to know. Thanks MooMoo!
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Old 2020-10-11, 08:58   #60
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All links for k=39 are available in the Wiki.
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Old 2020-10-13, 05:51   #61
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Quote:
Originally Posted by gd_barnes View Post
Good to know. Thanks MooMoo!
No problem!
Quote:
Originally Posted by kar_bon View Post
All links for k=39 are available in the Wiki.
I looked under the "history" section on your Wiki and noticed the following:

"2013-10-05: Checked to n = 2000000, Larry Soule"

Therefore, k=39 is doublechecked to n=2M, and not just to the n=1.263M limit mentioned in my post at: https://www.mersenneforum.org/showpo...6&postcount=58

Thanks for putting that info together; it's nice to know that double-checking went that far
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Old 2020-10-22, 23:26   #62
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Double checking for k<20 to n=1M is complete.

No problems found.

The links in post #57 are updated.

Continuing. Future statuses will be reported with the completion of each 20k range.
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Old 2020-11-02, 00:52   #63
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Double checking for k<40 to n=1M is complete.

No problems found.

The links in post #57 are updated.

Continuing.
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Old 2020-11-23, 00:55   #64
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Double checking for k<90 to n=1M is complete.

No problems found.

The links in post #57 are updated.

Continuing.
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