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1) Message boards : Wieferich and Wall-Sun-Sun Prime Search : New Version Testing (Message 147254)
Posted 264 days ago by Profile Rafael
I'm using 27.20.100.7987 under Windows. I do own an 8400 which has HD630, I can test it later once I eventually get back home.

If it runs on the HD 520, it will on the HD 630.
My computer doesn't want to update my iGPU driver because it is the latest version of the constructor and 64-bit atomics were not implemented in this release. Surprising because this is OpenCL 2.1 NEO and FP64 are supported. Not a real problem but I like to validate programs on iGPU, I already found a bug in genefer that was not detected with Nvidia driver.

You mean the one where it would randomly stop running the app back when we were coming up with geneferocl? I still don't understand why it would randomly stop on my skylake machine but not on the Haswell one...

At any rate if it's not needed to test on the 8400, then I won't bother. The machine is stored and I would have to get it out and set up.
2) Message boards : Wieferich and Wall-Sun-Sun Prime Search : New Version Testing (Message 147245)
Posted 264 days ago by Profile Rafael
As usual, I ran some tests on one of my Intel iGPUs. I ran it on my 6006u's HD520, and everything worked without a hitch. Improvement was between ~3x to almost 4x in one of the tests. Very impressive!

It's interesting, another OpenCL compiler is a good test.
On my computer, WWocl doesn't work on iGPU: unsupported OpenCL extension 'cl_khr_int64_base_atomics'.
The iGPU is an HD 630 and the driver is 23.20.16.4973. What is your driver?


I'm using 27.20.100.7987 under Windows. I do own an 8400 which has HD630, I can test it later once I eventually get back home.
3) Message boards : Wieferich and Wall-Sun-Sun Prime Search : New Version Testing (Message 147232)
Posted 264 days ago by Profile Rafael
As usual, I ran some tests on one of my Intel iGPUs. I ran it on my 6006u's HD520, and everything worked without a hitch. Improvement was between ~3x to almost 4x in one of the tests. Very impressive!

Old App
END exceeds max Workunit complete. Average speed: 0.24 Million primes per second. Checksum: 2F32CAD23BA5B1CA Workunit complete. Average speed: 0.09 Million primes per second. Checksum: B8B040FA3813FEB2 Workunit complete. Average speed: 0.11 Million primes per second. Checksum: 2B321984E3330D6A


New App
Workunit complete. Average speed: 0.29 Million primes per second. Checksum: 509DE6503B2A6E8E Workunit complete. Average speed: 0.68 Million primes per second. Checksum: 8B77D2DA053842DD Workunit complete. Average speed: 0.39 Million primes per second. Checksum: 6522CBC4CA2E4CFF Workunit complete. Average speed: 0.34 Million primes per second. Checksum: 589A69274A6AB5A8
4) Message boards : Generalized Fermat Prime Search : Guessing the future of GFN-22 and DYFL (Message 147166)
Posted 266 days ago by Profile Rafael
Given that a 3090 can run GFN22 in about 14 hrs, but DYFL will run in about 15.5 hrs, which sub project would you choose and which is more "likely" to have a chance of a prime, however remote?

The lower the number, the higher the likelyhood of it being prime, so if you're only looking for A gfn22 prime, don't run DYFL.

With that said, you might as well look for a WR and have a shot at the cash reward / fame, or tone it down and look for the first GFN21 known to man instead.
5) Message boards : Number crunching : Start discussing new goals for 2021 (Message 146454)
Posted 286 days ago by Profile Rafael

-Bring back GFN Manual Sieve, this time as Boinc Project.


Well then it's not manual anymore... :P


Also, any discussion of GFN sieving (or LLR sieving) needs to be done in the context of fast proof checking and the fact that at some point we'll no longer be running GFN double check tasks. That cuts the optimal sieving point in half, and therefore cuts not only the Genefer time in half, but the sieving time in half too.

Bottom line is if we didn't need sieving before, we certainly don't now.

I was under the impression that GFN23 was nowhere near close to optimal, if we ever got to need it for DYFL, and was only really closed as a result of manual sieve being closed in general.
6) Message boards : Number crunching : Start discussing new goals for 2021 (Message 146403)
Posted 287 days ago by Profile Rafael
Goals for 2021:

-Break DO servers in the middle of a challenge (again).
-Find a CUL / Woo Prime.
-Find the first GFN-21 prime.
-Bring back GFN Manual Sieve, this time as Boinc Project.
-Have the second user achieve the Shut Up! badge :)
7) Message boards : Number crunching : Wieferich and Wall- (Message 145983)
Posted 294 days ago by Profile Rafael
Thanks for your reply
I did try the GPU but they failed immediately so I probably have a slow GPU as the only project I can run is Proth Prime search which takes about 15 minutes to run
I checked the heat settings and it did not go above 31
my GPU is a NVIDIA GeForce GTX 1050 Ti
regards Paul

No no my friend, a 1050ti is anything but slow. Sure there are faster, but it's plenty enough to make do. If it's instantly failing and you can run PPS Sv, I would bet you have a problem with your drivers not installing OpenCl, for whatever reason, so I recommend downloading the latest version (it's safe, I'm using it as well), then using DDU to get rid of the old drivers and installing anew. After that, close and reopen BOINC and it should work perfectly, at least on the GPU side of things.
8) Message boards : Wieferich and Wall-Sun-Sun Prime Search : Any idea on WU times CPU vs. GPU? (Message 145875)
Posted 296 days ago by Profile Rafael
Running on a Gtx 1050, I've got a task on 6420s, but most fell in the 6750~6950s range.
9) Message boards : Problems and Help : Help with finding primes (Message 145705)
Posted 299 days ago by Profile Rafael
I'm not new to PrimGrid, but never paid all that much attention

But recently I've become really keen to also find some primes. I have found two small ones so far. It appears that the same names come up again and again for people finding primes... is there a tip in finding primes or is it just luck of the draw (and the fact that these people crunch a lot of tasks)?

Just want to check that I'm not missing something here. The tasks that run in Boinc, are they actually searching for primes or am I just validating other people searches.

Any help/clarity will be appreciated ;)

At the end of the day, luck really is the deciding factor. Bar that, the best you can do is to have A LOT of computing power to improve your odds of being assigned the right lotto ticket; that can be done by either having more machines yourself or renting servers from the cloud to crunch for you. For reference, last challenge we had someone dump over 3k to get additional processing power from Digital Ocean's servers.
10) Message boards : Problems and Help : Downloading Projects (Message 145285)
Posted 309 days ago by Profile Rafael
Hi Guys,
I am new here, I have downloaded BOINC but I do not know what to do next. I believe it is downloading projects but how do I do that?

Your computer already has Primegrid setup and is downloading tasks automatically, so strictly speaking, you don't "need" to do anything.

But if you want, you can do things to make your life better. The first suggestion is to go into BOINC's advanced view and go into Options -> Computing Preferences. There, set both "Store at least" and "Store up to an additional" fields to 0 to make it so that you don't download extra tasks. You may also want to adjust the "use at most % of CPUs" (always leave the "CPU times" one at 100%) to control the number of CPU cores boinc uses, which can be handy given you have a mobile CPU that probably doesn't have adequate cooling.

You might also want to change your subproject of choice. The default is PPS Sieve (CPU), but there are plenty of other options which you can pick from your account preferences on the website. You may read through what all of them do and pick one that you like, or go hunting for badges in all of them like most of us do. Just keep in mind that anything that says "LLR" is basically the same as running Prime95, which is very CPU intensive and can potentially cause your laptop to overheat if you don't have the cooling for it, so keep an eye out for that.

Speaking of subprojects, you CAN your nvidia graphics card to do work if you want. Some chose not to, either for the aforementioned cooling issues, or because using the card can cause screen lag in some instances, so it's up to you if you want to test it or leave it idle.

Last, welcome to the team. *dab*


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