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11) Message boards : Number crunching : PrimeGrid on PS3 (Message 7871)
Posted 5774 days ago by Zurtex
Anyone run PrimeGrid on a PS3? How'd it go?

Uhh, I don't know if you're referring to an already written algorithm. But otherwise I think it'd be quite hard to get prime grid running on the PS3.

From my limited experience of writing parallelizable algorithms and my slightly more but still limited of witting prime deterministic tests, they've not very compatible.

Factoring algorithms are of course a little different, they thrive in multi-threaded environments. But my experience with them is they tend to be better on SMP style environments, rather than the more complex type of parallelization that arises from Cell processing or GPU processing.

That said, I've not had a great deal of experience in this field, maybe someone else can point out types of algorithms that would work very well on something like a PS3.
12) Message boards : Number crunching : How about 64bit apps for Cullen and Woodall (Message 7711)
Posted 5793 days ago by Zurtex
I've only got a somewhat limited experience with this sort of thing. But a well encoded 64 bit algorithm just have at least a small advantage over a well encoded 32 bit algorithm when dealing with numbers of large bit size, simply due to the lower kernel overhead of coming up with standard mathematical operators for numbers larger than the CPU natively deals with.

But obviously this wouldn't make a huge difference in itself.
13) Message boards : Number crunching : Quick way of checking quantitative results? (Message 7692)
Posted 5794 days ago by Zurtex
jmblazek has just very helpfully pointed out which workunit it was :-).

It would still be nice however to have a page as I described, detailing which ones you were a double check on and so forth...

Think I could probably get more of my mathematician friends hooked on it if the data was more neatly displayed.
14) Message boards : Number crunching : Quick way of checking quantitative results? (Message 7691)
Posted 5794 days ago by Zurtex
Hey, I was just checking my account status and noticed that under my LLR TPS (n=333333) tests, the number of primes I've found has just gone up from 2 to 3.

Browsing through my recent work units I don't seem to be able to find which prime this is. I don't really care if it belongs on the top 5000 list or not, I just was curious as to what it was.

I contribute most my CPU power to PrimeGrid for the 'cool factor' of finding large primes or large factors of large numbers (can you tell I'm a mathematician ^_^). Is there some easy way to find a list of numbers that you've helped prove are primes?

Actually I would be also interested in what factors of what numbers you've found and what numbers you've helped prove are composite.

Maybe I'm missing something obvious, any help would be much appreciated :)
15) Message boards : Number crunching : Where do I find what primes I\'ve found? (Message 6200)
Posted 5921 days ago by Zurtex

Go down to the topic (thread) on this page (47 days ago) :

"Primes found at n=333333"

where you will find that your second one is a double check WU because you did not get an e-mail.

I now have 4 ( 2 resently) and all double checks but I do not see 2.50 credits in my results.
I think the reason that none are listed with that credit is to protect the prime from being "stolen" before it is reported to the 5000 list.

Somebody can clarify this last statement of mine.

Your response is much appreciated thanks :-)
16) Message boards : Number crunching : Where do I find what primes I\'ve found? (Message 6194)
Posted 5921 days ago by Zurtex
Looking at my account details it says:

Primes found at n=333333 2

Now, I know about the 1st prime because I got e-mailed about it, but where do I find out what this 2nd prime is? I don't seem to be able to find it anywhere in my account.
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