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Search: Posts Made By: Prime95
Forum: GMP-ECM 2022-09-24, 20:24
Replies: 22
Views: 1,064
Posted By Prime95
Finally, nailed the bugger. Starting in...

Finally, nailed the bugger.

Starting in 30.7, the curve starting point is incorrectly computed on every curve after the first curve. This is due to "leftover state" from stage 2.
The problem is...
Forum: Software 2022-09-24, 15:15
Replies: 2
Views: 85
Posted By Prime95
Include ../gwnum/polymult.a in LIBS. Edit: ...

Include ../gwnum/polymult.a in LIBS.

Edit: Nevermind, I see you did that. All the undefined references are from the polymult.a library
Forum: GPU Computing 2022-09-22, 20:39
Replies: 10
Views: 442
Posted By Prime95
I've been watching Radeon VII prices on eBay...

I've been watching Radeon VII prices on eBay since the Etherum PoS change. I've seen Buy-it-now prices around $400. One miner was offering 4 cards for $1000 today.

I should have my head examined...
Forum: GMP-ECM 2022-09-22, 20:33
Replies: 22
Views: 1,064
Posted By Prime95
I've created a special version that always dumps...

I've created a special version that always dumps the stage 1 result. I'm searching again for new factors in hopes the problem comes up again. At least then I'll be able to tell if the problem is...
Forum: GMP-ECM 2022-09-22, 19:53
Replies: 22
Views: 1,064
Posted By Prime95
Grrrr... false lead. A change in 30.6 caused an...

Grrrr... false lead. A change in 30.6 caused an extra power-of-two to be include in stage 1. That's pretty harmless.
Forum: GMP-ECM 2022-09-22, 17:41
Replies: 22
Views: 1,064
Posted By Prime95
In my case, the factor was found on the 4th...

In my case, the factor was found on the 4th curve. The screen output shows the sigma value at start of the ECM run and when the factor was found. The variable holding the sigma value was not...
Forum: GMP-ECM 2022-09-22, 06:18
Replies: 22
Views: 1,064
Posted By Prime95
Issue began in 30.6 -- affects stage 1 result. I...

Issue began in 30.6 -- affects stage 1 result. I have a painful way to find out which code change caused the problem.
Forum: GMP-ECM 2022-09-21, 19:47
Replies: 22
Views: 1,064
Posted By Prime95
The bad sigma problem just happened to me, so it...

The bad sigma problem just happened to me, so it was not a one-time memory corruption -- it is a prime95 bug.

The most concerning thing is that the factor is not found by prime95 when rerun with...
Forum: Marin's Mersenne-aries 2022-09-21, 00:27
Replies: 26
Views: 3,828
Posted By Prime95
You can use the manual results web page. ...

You can use the manual results web page.

Results should be sent automatically and immediately. Have you turned on the Manual Communication only option?
Forum: GMP-ECM 2022-09-18, 18:23
Replies: 22
Views: 1,064
Posted By Prime95
I could not reproduce the computation. I'll ask...

I could not reproduce the computation. I'll ask user xxx to try.

Corruption of the sigma value is possible -- though it seems unlikely. Corruptions usually result in crashes or incorrect results...
Forum: GMP-ECM 2022-09-18, 01:54
Replies: 22
Views: 1,064
Posted By Prime95
ECM group order mystery

Can anyone explain this:

Prime95 reports this:

ECM found a factor in curve #288, stage #2
Sigma=8055078829352661, B1=1000000, B2=2842011315.
UID: xxx, M257189 has a factor: ...
Forum: Mlucas 2022-09-15, 04:17
Replies: 9
Views: 351
Posted By Prime95
No need to apologize -- always glad to squash a...

No need to apologize -- always glad to squash a bug.
Forum: y-cruncher 2022-09-15, 03:28
Replies: 12
Views: 1,243
Posted By Prime95
How about renaming this thread to "AVX-512 and...

How about renaming this thread to "AVX-512 and Zen4 pre-release speculations",
then start a new thread "AVX-512 and Zen4 details"?

Or whatever you want to do. Those that care will find your...
Forum: Mlucas 2022-09-13, 07:04
Replies: 9
Views: 351
Posted By Prime95
Try changing worktype from "PM1" to...

Try changing worktype from "PM1" to "P-1"
Forum: Marin's Mersenne-aries 2022-09-12, 21:04
Replies: 26
Views: 3,828
Posted By Prime95
There were ~8000 below exponent 100 million. ...

There were ~8000 below exponent 100 million. Getting to 68M puts us ahead of the DC wavefront.

And yes, the list is getting restocked.
Forum: Software 2022-09-12, 19:25
Replies: 720
Views: 66,660
Posted By Prime95
P-1 will not catch any RAM errors. A PRP/Gerbicz...

P-1 will not catch any RAM errors. A PRP/Gerbicz run or Torture Test would be a good idea.
Forum: Software 2022-09-11, 15:01
Replies: 720
Views: 66,660
Posted By Prime95
Probably best to set Stage2ExtraThreads to zero. ...

Probably best to set Stage2ExtraThreads to zero. However, experimentation is required to get the true answer.
Forum: Software 2022-09-11, 09:39
Replies: 720
Views: 66,660
Posted By Prime95
Yes, the setting described in undoc.txt is...

Yes, the setting described in undoc.txt is MaxHighMemWorkers=n the default value for n is one. So, by default mprime setup to run two workers will do what you want.
Forum: Software 2022-09-10, 15:14
Replies: 2
Views: 107
Posted By Prime95
If you are using OS tools to restrict prime95 to...

If you are using OS tools to restrict prime95 to run on one specific core, then your two examples are equivalent.
Forum: PrimeNet 2022-09-10, 03:53
Replies: 8
Views: 574
Posted By Prime95
No need to unreserve. Copy the worktodo.txt line...

No need to unreserve. Copy the worktodo.txt line and the save files to one of your other computers.
Forum: Marin's Mersenne-aries 2022-09-10, 03:20
Replies: 26
Views: 3,828
Posted By Prime95
In the long run you will eliminate candidates...

In the long run you will eliminate candidates faster by doing this extra P-1. Not a lot faster, so in the short term it is not uncommon to run into a batch of exponents that don't yield as many...
Forum: Data 2022-09-09, 17:00
Replies: 60
Views: 2,548
Posted By Prime95
I just changed "what makes sense" work preference...

I just changed "what makes sense" work preference to 50% DC (up from 15%). This should translate into about 75% of CPU time devoted to first time tests and 25% to DC.

The other suggested change...
Forum: Software 2022-09-07, 00:03
Replies: 720
Views: 66,660
Posted By Prime95
Is there C code to set the environment variable...

Is there C code to set the environment variable such that hwloc uses HWLOC_CPUKINDS_RANKING=coretype?
Forum: PrimeNet 2022-09-06, 22:16
Replies: 3
Views: 226
Posted By Prime95
Welcome to GIMPS! The assignment rules...

Welcome to GIMPS!

The assignment rules developed over a long period of time. Originally, it was a free-for-all you get the lowest available assignment.

This led to problems with milestones. ...
Forum: Software 2022-09-06, 16:00
Replies: 720
Views: 66,660
Posted By Prime95
Was that lstopo from hwloc 2.8.0?

Was that lstopo from hwloc 2.8.0?
Showing results 1 to 25 of 1000

 
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