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PrimeGrid Challenge Series 2026

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Oh, I forgot, any primes reported in the next 24 hours, starting 15 minutes from now, get an extra special badge, for the "mountain stage".
 
BTW all 3 work units that found a prime were from one of 2 9755's. I love those baby's !
 
Ken g6 said:
Oh, I forgot, any primes reported in the next 24 hours, starting 15 minutes from now, get an extra special badge, for the "mountain stage".
Click to expand...
I've tried to bunker some stuff for the TdP Mountian Stage!!! I think I've maxed my home uploaded for an hour or 2!
 
Anybody here gotten a mountain stage prime? I didn't bunker for it, and didn't switch most of my stuff to GFN-17 until halfway through it but nothing here so far.
 
and another

Dear Primefinder,

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 Generalized Fermat Prime Search n=17 Mega (GFN-17-Mega). What makes this prime unique is that it's large enough to enter the Top 5000 List in The Largest Known Primes Database.

Since you have auto-reporting selected, the following prime was submitted on your behalf:

Added 141851 : 447992080^131072+1 (1133940 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.

PrimeGrid staff
 
and another in the mountain stage

Dear Primefinder,

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 Generalized Fermat Prime Search n=17 Mega (GFN-17-Mega). What makes this prime unique is that it's large enough to enter the Top 5000 List in The Largest Known Primes Database.

Since you have auto-reporting selected, the following prime was submitted on your behalf:

Added 141860 : 450079700^131072+1 (1134204 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.

PrimeGrid staff
 
Icecold said:
Anybody here gotten a mountain stage prime? I didn't bunker for it, and didn't switch most of my stuff to GFN-17 until halfway through it but nothing here so far.
Click to expand...
As you can see, I did. its linked above.
 
Dear Primefinder,

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 Generalized Fermat Prime Search n=17 Mega (GFN-17-Mega). What makes this prime unique is that it's large enough to enter the Top 5000 List in The Largest Known Primes Database.

Since you have auto-reporting selected, the following prime was submitted on your behalf:

Added 141899 : 456061560^131072+1 (1134956 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.

PrimeGrid staff
 
Markfw said:
Dear Primefinder,

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 Generalized Fermat Prime Search n=17 Mega (GFN-17-Mega). What makes this prime unique is that it's large enough to enter the Top 5000 List in The Largest Known Primes Database.

Since you have auto-reporting selected, the following prime was submitted on your behalf:

Added 141899 : 456061560^131072+1 (1134956 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.

PrimeGrid staff
Click to expand...

Does hardware used make a substantial difference on finding these prime numbers? I have only found one thus far, but then again I have only recently joined BOINC.
 
Rollo said:
Does hardware used make a substantial difference on finding these prime numbers? I have only found one thus far, but then again I have only recently joined BOINC.
Click to expand...
I really don't know for sure, but having a lot of cores and avx-512 compatible cores does affect statistically how many you MIGHT find. 2 of my boxes have 128 cores, and one has 64 and all are avx-512 compatible.
 
Rollo said:
Does hardware used make a substantial difference on finding these prime numbers? I have only found one thus far, but then again I have only recently joined BOINC.
Click to expand...
Only in terms of the speed with which you test candidates. And in terms of which candidates you can test. PPS candidates are somewhat more likely to be prime because they were sieved better, removing whatever composites were easily stumbled upon. But GPUs can only test GFN candidates.
 
Rollo said:
Pretty easy for me...I now only use cpu's for BOINC and gpu's for Folding.
Click to expand...
Well, I now have 6 primes found this month, and I want to know how each was found. If NO GPUs found any, I will put those on F@H.
 
Markfw said:
Well, I now have 6 primes found this month, and I want to know how each was found. If NO GPUs found any, I will put those on F@H.
Click to expand...

It is rather irritating that there is so little information available concerning BOINC. I literally stepped into this blind so to speak. If you discover gpu's are producing I will certainly change my tactics...maybe a good spot to dump my AMD gpu's lol. I do wish someone with the knowledge would start a thread on detailed setting up of hardware for BOINC. There is far more information out there for Folding than BOINC in general.
 
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Markfw said:
  1. when you find a prime, how do you know if the CPU or GPU found it ?
Click to expand...
The prime email shows the work unit it was found on and has a link to the work unit. Once you click that link under 'Application' it will either say Genefer 17 Mega v4.10 (cpuGFN17MEGA_mt) which is a CPU WU, or Genefer 17 Mega v4.10 (OCLcudaGFN17MEGA) which is a GPU WU.

Rollo said:
It is rather irritating that there is so little information available concerning BOINC. I literally stepped into this blind so to speak. If you discover gpu's are producing I will certainly change my tactics...maybe a good spot to dump my AMD gpu's lol. I do wish someone with the knowledge would start a thread on detailed setting up of hardware for BOINC. There is far more information out there for Folding than BOINC in general.
Click to expand...
A big part of this is that BOINC is just a platform for various projects to run work. Each project is unique and hardware requirements, setup, etc. is unique to that project. It's different with Folding because it's their own client and their own project, so any information out there is specific to both that program and project. There is a pretty decent amount of information about Primegrid on the Primegrid message board, they have a Discord as well, etc. Primegrid is probably the best ran project, there are quite a few smaller BOINC projects where information is much harder to come by. Primegrid uses OpenCL for all GPU tasks, so AMD GPU's do relatively decent on it. Not as good or better than Nvidia cards, but definitely closer to Nvidia than on Folding@home. This current "challenge" (tour de primes) is also kind of an outlier because you can run any primegrid subproject in it. Normally when it's a specific challenge on a specific subproject we'll post more information such as optimal number of threads per task, etc. But tour de primes isn't a team challenge it's just kind of a free for all for fun run it for the month kind of thing, so there's a lot of personal preference on if you want to try for super large primes, the highest number of primes, etc. On the next normal Primegrid challenge though there should be more information and guidance.

Markfw said:
Well, I now have 6 primes found this month, and I want to know how each was found. If NO GPUs found any, I will put those on F@H.
Click to expand...
Given that there's a decent amount of luck involved as far as what hardware found primes, I would recommend looking at the 'tasks in last 24 hours' chart under your account on the Primegrid site and seeing how many tasks you're completing with each GPU vs each of your CPU's and determining based on that if they're worth running or not.
 
Icecold said:
The prime email shows the work unit it was found on and has a link to the work unit. Once you click that link under 'Application' it will either say Genefer 17 Mega v4.10 (cpuGFN17MEGA_mt) which is a CPU WU, or Genefer 17 Mega v4.10 (OCLcudaGFN17MEGA) which is a GPU WU.


A big part of this is that BOINC is just a platform for various projects to run work. Each project is unique and hardware requirements, setup, etc. is unique to that project. It's different with Folding because it's their own client and their own project, so any information out there is specific to both that program and project. There is a pretty decent amount of information about Primegrid on the Primegrid message board, they have a Discord as well, etc. Primegrid is probably the best ran project, there are quite a few smaller BOINC projects where information is much harder to come by. Primegrid uses OpenCL for all GPU tasks, so AMD GPU's do relatively decent on it. Not as good or better than Nvidia cards, but definitely closer to Nvidia than on Folding@home. This current "challenge" (tour de primes) is also kind of an outlier because you can run any primegrid subproject in it. Normally when it's a specific challenge on a specific subproject we'll post more information such as optimal number of threads per task, etc. But tour de primes isn't a team challenge it's just kind of a free for all for fun run it for the month kind of thing, so there's a lot of personal preference on if you want to try for super large primes, the highest number of primes, etc. On the next normal Primegrid challenge though there should be more information and guidance.


Given that there's a decent amount of luck involved as far as what hardware found primes, I would recommend looking at the 'tasks in last 24 hours' chart under your account on the Primegrid site and seeing how many tasks you're completing with each GPU vs each of your CPU's and determining based on that if they're worth running or not.
Click to expand...
Thanks. Out of the 6, only one was a GPU, the rest CPU. Considering the cores vs cards, the video cards are doing OK, as I only have 2 working, vs 208 cores.
 
I've found nothing but failure trying to Fold and BOINC at the same time. I have to pick one or the other for each machine.

Edit: My circuit breaker just informed me it was not having any of that combined cpu/gpu action for BOINC tonight... 😛
 
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Also found another oddity while getting all the machines back online after the electrical interruption. GPU-Z will show 100% load regardless of what is saved in preferences. You have to reset the project to get the gpu reading to go back to normal. It's a pita getting these all back up and running when the majority of them are not connected to a mouse/keyboard/monitor. 😡
 
Jeesh 2 in one day ??? thats 7 overall


Dear Primefinder,

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 Generalized Fermat Prime Search n=17 Mega (GFN-17-Mega). What makes this prime unique is that it's large enough to enter the Top 5000 List in The Largest Known Primes Database.

Since you have auto-reporting selected, the following prime was submitted on your behalf:

Added 141909 : 457755342^131072+1 (1135167 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.

PrimeGrid staff
 
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