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Sophie Germain Prime Search :
it could be the mouse that roared
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 compositeVolunteer tester
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The old 1500 MHz 32-bit Pentium M laptop is faring better on SG than on PPSE.
It was completing 6 PPSE tasks/day and winning none during TdP (it would get one occasionally before), taking around 15,500 seconds to complete a task. There's very little choice what to run now that LLR2 doesn't run on 32-bit XP. It might do better with seive work, but I doubt it has enough RAM.
On SG, it does 7 tasks/day @ 12,365 seconds it's first on 3 (even though it doesn't count for TdP). A few fast systems are doing SG tasks in less than 700 seconds but they have thousands of tasks downloaded. The laptop easily beat a Xeon W-2125 CPU @ 4.00GHz by a margin of over 18 hours. At that rate, if it should be so lucky, it would come out first on an SG prime with many hours to spare. The odds of success are at least measurably greater than zero on this subproject, thanks to these wingmen.
The laptop is propped up on it's side so that the exhaust vents upward out the other side and the normal inflow is unimpeded. This seems to be thermally more efficient than the normal orientation. It's been running like this almost continuously for more than 3 years. | |
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Michael Goetz Volunteer moderator
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The old 1500 MHz 32-bit Pentium M laptop is faring better on SG than on PPSE.
It was completing 6 PPSE tasks/day and winning none during TdP (it would get one occasionally before), taking around 15,500 seconds to complete a task. There's very little choice what to run now that LLR2 doesn't run on 32-bit XP. It might do better with seive work, but I doubt it has enough RAM.
You could install 64 bit Linux and run LLR2, no? I'd recommend not erasing XP just in case there's trouble installing Linux on such an old system.
It *might* be possible to run 64 bit Linux in a VM running under 32 bit XP. I've done that before with VMWare's VMPlayer, but A) this requires that your Pentium have a specific hardware feature (VTX, and it needs to be enabled in the BIOS) which it might not have, and B) it requires the VM to support it. VMs used to support doing this, but I don't know if they still do.
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Scott BrownVolunteer moderator
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You could install 64 bit Linux and run LLR2, no?
No. Pentium M is a 32-bit processor, so it cannot run a 64-bit OS.
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Michael GoetzVolunteer moderator
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You could install 64 bit Linux and run LLR2, no?
No. Pentium M is a 32-bit processor, so it cannot run a 64-bit OS.
Ah, you're right. The CPU isn't just old, it's ancient. It's from 2003. It's older than some of our users. Some of the Pentiums from the 2000's were 64 bit, but not this one.
It also lacks the VT-X bit.
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compositeVolunteer tester
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[quote]
You could install 64 bit Linux and run LLR2, no?
I already knew enough not to try that on that system. BOINC still runs on XP so I'll leave well enough alone.
LLR2 is attractive to run on old systems because proof tasks are short and main tasks have no race. I don't care if it takes all day to crunch a PPS or PPS-mega task. But support for LLR2 on 32-bit systems was dropped. Or was it just dropped for XP? The Applications page of PG says that the LLR2 projects can use "Linux running on an Intel x86-compatible CPU". | |
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[...] But support for LLR2 on 32-bit systems was dropped. Or was it just dropped for XP? [...]
The way I read the thread End of support for ..., it was just XP. So if you are able to get another (32-bit) OS, maybe you have a chance to run LLR2? /JeppeSN | |
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Michael GoetzVolunteer moderator
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[...] But support for LLR2 on 32-bit systems was dropped. Or was it just dropped for XP? [...]
The way I read the thread End of support for ..., it was just XP. So if you are able to get another (32-bit) OS, maybe you have a chance to run LLR2? /JeppeSN
Correct. It's just XP that is no longer supportable. Vista, 7, 8.x, or 10 32 bit versions should all work, as will Linux.
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