• Folding@EVGA
  • PrimeGrid is proud to announce that we have a new sub-project, the Fermat Divisor search.
2019/09/06 18:23:22
bcavnaugh
New Project:  Fermat Divisor Search
PrimeGrid is proud to announce that we have a new sub-project, the Fermat Divisor search.

This is a variant of our other PPS (Proth Prime Search) sub-projects and is specially designed to have a better chance of finding a Fermat Divisor.
Unlike most of our other sub-projects, this one will not run forever.
It has a limited number of candidates to check, and once they're gone, the project is over.
My best guess is that this project will last about three months.
It uses the same badge and stats as the other PPS sub-projects, so there's no new badge.
But this is probably the best chance of discovering a Fermat divisor and earning that rare   badge.
For more information and discussion, read this forum thread or join our Discord server.   6 Sep 2019 | 22:18:39 UTC Comment
 
Running without MT HT Off about 2-3 minutes per task.
https://www.primegrid.com/results.php?hostid=502676&offset=0&show_names=0&state=4&appid
 
PrimeGrid preferences
Fermat Divisor Search LLR (PPS-DIV)
k·2n+1 for k=19683 and 5<=k<=49
Supported platforms:
  • Windows: 32 bit, 64 bit
  • Linux: 32 bit, 64 bit
  • Mac: 64 bit
  • Multi-threading is supported but is NOT recommended.  Click here to set the maximum number of threads.

Deadline: 4 days (up to 30 days)
Recent average CPU time: 0:00:00
2019/09/07 00:42:53
bill1024
Thanks Bill, running a few tasks will see how it goes.
2019/09/07 07:53:34
yodap
Thanks bcav!
Started some up, HT enabled, 6/8 cores. Not to quick here, 30-40 miutes. I'll disable HT when these finish.
2019/09/07 08:20:23
bcavnaugh
In all going with HT Disabled and Single MT on my Fast CPUs (AVX512) and MT 2 Cores on my slow CPUs.
Fast: https://www.primegrid.com/results.php?hostid=502676&offset=0&show_names=0&state=4&appid
Slow: https://www.primegrid.com/results.php?hostid=911551&offset=0&show_names=0&state=4&appid
* Starting in 20 minutes after current Tasks complete.
2019/09/07 08:26:22
Cool GTX
bcavnaugh
In all going with HT Disabled and Single MT on my Fast CPUs (AVX512) and MT 2 Cores on my slow CPUs.
Fast: https://www.primegrid.com/results.php?hostid=502676&offset=0&show_names=0&state=4&appid
Slow: https://www.primegrid.com/results.php?hostid=911551&offset=0&show_names=0&state=4&appid
* Starting in 20 minutes after current Tasks complete.


How fast is your system RAM ?
2019/09/07 08:33:14
bcavnaugh
Cool GTX
bcavnaugh
In all going with HT Disabled and Single MT on my Fast CPUs (AVX512) and MT 2 Cores on my slow CPUs.
Fast: https://www.primegrid.com/results.php?hostid=502676&offset=0&show_names=0&state=4&appid
Slow: https://www.primegrid.com/results.php?hostid=911551&offset=0&show_names=0&state=4&appid
* Starting in 20 minutes after current Tasks complete.

How fast is your system RAM ?

3600 MHz on the Fast (i9-7940X 4.20GHz)
2400 MHz on the Slow (Xeon(R) CPU E5-2667 v4 3.20GHz) .
2019/09/07 09:37:49
bcavnaugh
Seems that running 2 Cores is slower on the Slow CPU so going back to Single Core now.
2 Cores https://www.primegrid.com/result.php?resultid=1022718468
1 Core https://www.primegrid.com/result.php?resultid=1022712849
2019/09/07 12:20:48
bcavnaugh
 On the Faster CPU
Congratulations! Our records indicate that a computer registered by you has found a unique prime number.
This computer is running BOINC, is attached to the PrimeGrid project, and is assigned to the Proth Prime Search.
What makes this prime unique is that it's large enough to enter the Top 5000 List in Chris Caldwell's The Largest Known Primes Database.
Since you have auto-reporting selected, the following prime was submitted on your behalf:
Added 129901 : 19683*2^1868828+1 (562578 digits)
This prime was found on this workunit which will automatically show as a prime result after verification by the Largest Known Primes Database.
If you have any questions or concerns, please contact us and we will surely resolve any problems.
Once again, congratulations on your find! Thank you for participating in PrimeGrid.
2019/09/07 15:43:20
bcavnaugh
Seems like Tasks are now taking longer and longer to complete then when we first started.
Went from 3 Minutes to now over 12 minutes to complete.
2019/09/09 12:25:54
bcavnaugh
12

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