PrimeGrid Challenges 2021

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Ken g6

Programming Moderator, Elite Member
Moderator
Dec 11, 1999
15,600
2,676
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Day 6 stats:

Rank___Credits____Username
3______10808819___parsnip soup in a clay
4______10330990___Icecold
6______7976846____crashtech
10_____6274503____xii5ku
20_____3413252____biodoc
32_____2256313____emoga
50_____1342479____Orange Kid
54_____1264789____Skillz
60_____1130979____HutchinsonJC
75_____893434_____Lane42
76_____887476_____markfw
93_____651974_____Skivelitis2
137____399670_____VirtualLarry
143____380288_____Ken_g6
225____154281_____waffleironhead
226____153769_____SlangNRox

Rank__Credits____Team
1_____48319870___TeAm AnandTech
2_____39087938___SETI.Germany
3_____35724856___Czech National Team
4_____33382996___Antarctic Crunchers

The buffer is getting better. Good thing too because it looks like quite a race behind us.
 

Ken g6

Programming Moderator, Elite Member
Moderator
Dec 11, 1999
15,600
2,676
55
Mostly final stats:

Rank___Credits____Username
3______19952773___xii5ku
4______13685546___parsnip soup in a clay
5______12549002___Icecold
9______9488411____crashtech
21_____3986292____biodoc
40_____2256313____emoga
54_____1540614____Orange Kid
60_____1359571____HutchinsonJC
62_____1343262____Skillz
70_____1192687____markfw
80_____999773_____Lane42
102____681987_____Skivelitis2
136____495934_____VirtualLarry
137____483980_____Ken_g6
221____206182_____SlangNRox
222____205826_____waffleironhead
288____77333______kiska

Rank__Credits____Team
1_____70505495___TeAm AnandTech
2_____49828429___Czech National Team
3_____48292775___SETI.Germany
4_____39133289___Antarctic Crunchers

Looks like we won by just over a xii5ku-length. ;)

@VirtualLarry, I...
 

Markfw

CPU Moderator, VC&G Moderator, Elite Member
Super Moderator
May 16, 2002
22,183
10,409
136
I made 10th place !

Now back to WCG
 
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VirtualLarry

No Lifer
Aug 25, 2001
52,639
7,332
126
Thanks for the stats. That was fun. And now I know my main rig is slightly unstable, for some reason. :p

Nothing like a little hard-driving PrimeGrid calculations to shake the gremlins out.
 
Last edited:
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Markfw

CPU Moderator, VC&G Moderator, Elite Member
Super Moderator
May 16, 2002
22,183
10,409
136
Thanks for the stats. That was fun. And now I know my main rig is slightly unstable, for some reason. :p
Mining killed it. Just stop mining, and it may recover. Thats the problem with it :)
 
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VirtualLarry

No Lifer
Aug 25, 2001
52,639
7,332
126
Mining killed it. Just stop mining, and it may recover. Thats the problem with it :)
You know, you're probably right. Sigh. This PC hasn't had an easy life. I burned out two NICs and a number of GPUs in it. (Not same PSU in all cases, PSU had been changed.)
 

StefanR5R

Elite Member
Dec 10, 2016
4,414
5,093
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Last edited:

Ken g6

Programming Moderator, Elite Member
Moderator
Dec 11, 1999
15,600
2,676
55
If the name is to be believed, the next challenge is happening all the time. But results for Euler's Constant Challenge won't count until the 23rd. ;)
 
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StefanR5R

Elite Member
Dec 10, 2016
4,414
5,093
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From the other thread, about the December challenge:
The PG Geminids Shower Challenge is mainly a GPU race, though CPU works in one of the subprojects (GFN-21). I am not sure if CPUs are worth running in it, though. I'll put CPU in it if the gang thinks it's worthwhile.
From the PrimeGrid preferences page:
GFN-21: 20% long job credit bonus
GFN-22: 50% long job credit bonus
DYFL: 75% long job credit bonus​
I.e. there is a hefty bonus attached to the latter two (which are not available on CPU), or vice versa, there is a considerable malus attached to GFN-21 in this challenge.

Also: GFN-21-CPU: 392 hours recent average CPU time = bring many cores and a good deal of patience.
 

Markfw

CPU Moderator, VC&G Moderator, Elite Member
Super Moderator
May 16, 2002
22,183
10,409
136
So, forget CPU's... Well, then I am out. Cancer wins over prime numbers.
 

StefanR5R

Elite Member
Dec 10, 2016
4,414
5,093
136
I think I will use CPUs in the upcoming 3-days AP27 challenge (in addition to all GPUs of mine), but most likely not in the 10-days GFN challenge.
 

Fardringle

Diamond Member
Oct 23, 2000
9,098
671
126
My GPU resources are even more tiny than my CPU resources, but I plan to run what little I have for both of the upcoming PrimeGrid challenges.
 

Skillz

Senior member
Feb 14, 2014
421
365
136
My GPU resources are even more tiny than my CPU resources, but I plan to run what little I have for both of the upcoming PrimeGrid challenges.
Good to hear.

It's a long shot, but we have a chance (slim one) to take 1st place overall in the PG challenge. Sadly, we do not control that destiny. Which makes it a slim chance, but we can come in 2nd overall if we take 1st in the remaining two challenges.
 

Fardringle

Diamond Member
Oct 23, 2000
9,098
671
126
Good to hear.

It's a long shot, but we have a chance (slim one) to take 1st place overall in the PG challenge. Sadly, we do not control that destiny. Which makes it a slim chance, but we can come in 2nd overall if we take 1st in the remaining two challenges.
Sadly, I was going to try to add a laptop with a mobile Quadro RTX 3000 into the mix for a few days, but I can't get Windows, GPU-Z, or BOINC to say that the GPU actually has OpenCL support, so it can't run the AP-27 tasks. I've tried reinstalling the Quadro drivers multiple times, and even tried removing those and installing the regular GTX/RTX drivers with no luck. It will run CUDA tasks just fine, but the AP-27 OpenCL tasks fail immediately with an error that the system can't identify any OpenCL devices. :(
 

Skillz

Senior member
Feb 14, 2014
421
365
136
That's weird for sure.

All my stuff is setup, just gotta click the start button in 4 hours and 50 minutes.
 

Markfw

CPU Moderator, VC&G Moderator, Elite Member
Super Moderator
May 16, 2002
22,183
10,409
136
Question... I thought primegrid was all CPU. Is there a GPU task ? Whats the config ?
 

Skillz

Senior member
Feb 14, 2014
421
365
136
Question... I thought primegrid was all CPU. Is there a GPU task ? Whats the config ?
It depends on the sub project. Some sub projects run better on GPUs and some run on CPUs.

For this particular challenge the AP27 subproject can run on both CPUs and GPUs, but the GPU tasks (for a decent GPU) can be completed in about 15 minutes or less while even a good, fast CPU will take hours.

No config necessary. Just login to your PG account and uncheck all projects except the AP27 one. Then make sure it's only selected to run on Nvidia (or AMD) GPUs and not on CPUs.

edit
This thread has lots of information about the sub project in the challenge

And the main page at https://www.primegrid.com/ has a count down timer of what the event starts.

Do not forget. Work units are only counted if they are downloaded AFTER the start of the event and returned BEFORE the start of the event. So do not start too early as those Work Units will not count.
 
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