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Old 2008-08-29, 20:10   #1
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Default IBM Power 6

Would Prime95 run on computer with above chip?

If yes, what % increase to current effort would be added with a 64 core, 5.0 GHZ computer?
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Old 2008-08-29, 20:30   #2
Mini-Geek
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I don't think Prime95 per se would run on it since something like that's most likely not on Windows, but something at http://www.mersenne.org/freesoft.htm should be able to run it. Which depends on the OS.

I don't know how fast it'd run, but I'd recommend running a different number on each core to maximize parallelization. GIMPS has 38527 cores classified as P4 (includes P4, Core 2, and any other fairly new Intel chip), so I doubt your 64 would be a very large percentage, but hey it'd be quite a bit of processing power and would be much appreciated.

Also, be sure to read this disclaimer posted on the Download page:
Quote:
Disclaimers: It is up to you to get your employer's permission before installing this software on any office machines. Many companies have a strict policy against running any non-business software. ... You should decide beforehand how you are going to split any prize money if you are using a company, friend's, or co-worker's machine.
There's some other disclaimer-type thing saying that you need to have it in writing with your company, since it could cost them a lot in power and cooling costs. With such a powerful machine, I doubt it's yours personally, so you need to be very sure you have permission to run it. It will use a lot of power and make a lot of heat that will need to be cooled to run such a powerful computer 100% 24/7, so make sure your company/the owner of this is willing to take that bill.
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Old 2008-08-29, 20:56   #3
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Default Power 6

Os SUSE Linux Enterprise Server 10SPI for Power
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Old 2008-08-29, 21:04   #4
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Why not help a small project like No Prime Left Behind?
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Old 2008-08-29, 21:12   #5
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Quote:
Originally Posted by Unregistered View Post
Would Prime95 run on computer with above chip?

If yes, what % increase to current effort would be added with a 64 core, 5.0 GHZ computer?
If you are interested in other prime searches, there is software that would kick-ass on the Power 6.
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Old 2008-08-30, 04:40   #6
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Quote:
Originally Posted by em99010pepe View Post
Why not help a small project like No Prime Left Behind?
Hmm...but without an LLR version for anything other than x86, that might turn out to be a bit tricky. (Not that I mean to try to detract "customers" from my "home project" of sorts...) Maybe it wouldn't be too hard for Mlucas or Glucas to be modified to do LLR tests instead of LL's? Because if an LLR version of either of those programs was developed, that would be a huge boon for lots of "smaller" projects, most of which do LLR or Proth tests as their primary workload.

Last fiddled with by mdettweiler on 2008-08-30 at 04:41
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Old 2008-08-30, 11:13   #7
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Quote:
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Hmm...but without an LLR version for anything other than x86, that might turn out to be a bit tricky. (Not that I mean to try to detract "customers" from my "home project" of sorts...) Maybe it wouldn't be too hard for Mlucas or Glucas to be modified to do LLR tests instead of LL's? Because if an LLR version of either of those programs was developed, that would be a huge boon for lots of "smaller" projects, most of which do LLR or Proth tests as their primary workload.
Jean has worked on a generic LLR, i.e. one that can run on any hardware. I've actually done some testing of it. It works, but is much slower and the x86 version. I don't recall how many orders of magnitude, but it might have been 4x slower or even more for bases that are powers of 2.
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Old 2008-08-30, 14:36   #8
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Quote:
Originally Posted by rogue View Post
Jean has worked on a generic LLR, i.e. one that can run on any hardware. I've actually done some testing of it. It works, but is much slower and the x86 version. I don't recall how many orders of magnitude, but it might have been 4x slower or even more for bases that are powers of 2.
Hmm...does anyone have any figures on how much slower Mlucas and Glucas are as compared to Prime95 (that is, all running on an x86 CPU)? I think I've heard that those were significantly slower, too, though still better than nothing. The same might apply for the generic LLR application, simply because there currently is no other LLR option for non-x86 CPUs.
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