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drummers-lowrise
1) Message boards : Number crunching : AVX-512 Instructions (Message 129469)
Posted 43 days ago by Profile JayProject donor
Can anyone confirm which of the AVX-512 instructions are used and can be taken advantage of with the latest LLR implementations?

There are a few different processors with varying degress of support:
https://en.wikipedia.org/wiki/AVX-512#CPUs_with_AVX-512
and I'm wondering which ones will be most likely to see the potential gains.

Thanks,
Jay
2) Message boards : Problems and Help : Can you hide that BOINC Manager is running? (Message 128818)
Posted 70 days ago by Profile JayProject donor
Can you hide that the BOINC Manager is running? I'd like to run it on some machines without notifying the user that there is an application burning through their CPU time.


You can install it as a service (in windows). The BOINC website has instructions.
https://boinc.berkeley.edu/wiki/Installing_BOINC


If you do so, and you run Primegrid, you are violating the rules set out here:
http://www.primegrid.com/info.php
3) Message boards : Generalized Fermat Prime Search : DO YOU FEEL LUCKY? (Message 126483)
Posted 139 days ago by Profile JayProject donor
Do You Feel Lucky?

...
If a new Mersenne prime is found, we will increase b again so that we continue to search for a world record.



I'm going to sit this one out, as my 285 GTX seems a little outdated. I wish you all luck.

I do have a question related to the quoted part of Mike's post above. What happens when PrimeGrid finds the World's Largest Known Prime? Does this project pause and restart sometime in the future when someone else beats the record and we know how much larger we need to be looking for?
4) Message boards : Generalized Fermat Prime Search : DO YOU FEEL LUCKY? (Message 125599)
Posted 148 days ago by Profile JayProject donor
Well, do you?


Should I? Should someone?
5) Message boards : Number crunching : Conjunction of Venus & Jupiter Challenge (Message 124765)
Posted 165 days ago by Profile JayProject donor
EDIT: This is a a script I run for every challenge, and it only measure how far the leading edge advances. It's not a measurement of how much work is done. Tasks increase in size significantly as the leading edge advances, which means the amount of computation needed to advance the leading edge now is much greater than the amount of computation needed to advance the leading edge at the beginning of the challenge.


Since, as you said, tasks are much larger than at the beginning of the project, and since computation power is generally greater than in the past, would it make since (and be easy to implement in the script) to say, "Since the challenge started # days ago, we've done x amount of work on the project. In the # days prior to the challenge we did y amount of work on the project."

I feel like comparing the more recent, non-challenge time, to the challenge time, would give me a better feeling for what the challenge is accomplishing vs not having the challenge.

I could be misunderstanding this completely though...
6) Message boards : Number crunching : Conjunction of Venus & Jupiter Challenge (Message 124448)
Posted 170 days ago by Profile JayProject donor
The first task has been returned in just over 7 hours!


Dang... What was the hardware? I hope he or she keeps going at that pace.
7) Message boards : Number crunching : Conjunction of Venus & Jupiter Challenge (Message 124218)
Posted 174 days ago by Profile JayProject donor
While it is appreciated that the only participants likely to have any chance of winning are those with highly performant machines, ...


I think that's going to be true regardless of the challenge particulars. The more / bigger hardware you throw at it, the more / higher you will score.

It is more pleasurable for us lowly amateurs to participate if we have the chance of getting *some* placement on the scoreboard.


I'm running a 9-year old CPU. I will complete at least one unit in this challenge, and likely more (barring a days long power outage, major hardware failure, meteorite hitting my home, etc). I honestly don't care about my placement in the challenge, but I do look at the scores for my name when it's done just to see where I'm at.

We would hate to feel we were somehow a nuisance, getting in the way of the serious competitors, in the way that small children at a skateboard park get in the way of the big boys. However, if the admins decide that our efforts are not really needed on these challenges, we can stay clear if that is best.


I don't understand how anyone could "get in the way" of anyone else. I believe there are way more than enough tasks to go around. We're not going to run out of them at any point during the challenge (unless we find all 5 remaining primes and prove the conjecture before it ends which is unlikely). My opinion is that every bit of effort is beneficial to the goal. The workunits all need to be checked eventually. Maybe you only check one while the next person checks five. That's fine, they all need to be checked eventually, and as a group, checking six is more than checking five.
8) Message boards : Seventeen or Bust : The SoB Double Check has begun (Message 124143)
Posted 175 days ago by Profile JayProject donor
56% complete!



70% by the end of the 2019 challenge??
9) Message boards : Seventeen or Bust : Seventeen or Bust and the Sierpinski Problem (Message 124131)
Posted 175 days ago by Profile JayProject donor
Question (or complaint):

Why do you want your contributors to focus on a project which most current CPUs do not support effectively?
...
Why doesn't PrimeGrid go with the times and point their contributors to those projects which are more efficiently supported by current popular computer hardware?



I've got to disagree with the effectiveness of older cpu's. I have an i7-950, as the only cpu I have used on this project. That processor was introduced in the 2nd quarter of 2009 according to Intel. I have earned, with that single cpu, over 20 million credit on SOB. It currently takes approximately 4.5 days to return a task. I'm usually the first to return a workunit.
10) Message boards : Seventeen or Bust : The SoB Double Check has begun (Message 124073)
Posted 177 days ago by Profile JayProject donor
"2018's SoB challenge made a nice dent in the double check,"
This make it hard to run knowing you will not find a Prime or receive one.
Bummer that it was Picked for 2019 once more.


This makes no sense at all. The only thing we know for sure is that a prime wasn't found in 2018's SOB challenge. That has zero bearing on what happens in the 2019 challenge. I suppose that if you choose not to participate, then you can say for sure that you won't find a prime, but that goes with any challenge, or any subproject.


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