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Old 2019-03-16, 00:50   #1
GP2
 
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Default PRP triple checks?

PRP triple check needed.

This should be done with mprime/Prime95 rather than gpuOwL because it needs to be residue type 1.

Code:
PRPDC=1,2,86670349,-1,76,0,3,1
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Old 2019-03-16, 08:40   #2
S485122
 
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Quote:
Originally Posted by GP2 View Post
PRP triple check needed.
...
This is not supposed to happen. Both PRP's have been done this year, I suppose with mature software.

Some people even suggested that with PRP, except for the possibility of cheating, there was no need for double checks.

I think the run that yielded the wrong result should be thoroughly investigated.

Jacob
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Old 2019-03-16, 12:20   #3
endless mike
 
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Quote:
Originally Posted by GP2 View Post
PRP triple check needed.

This should be done with mprime/Prime95 rather than gpuOwL because it needs to be residue type 1.

Code:
PRPDC=1,2,86670349,-1,76,0,3,1
I don’t think that’s true about not using gpuowl. I’m still on v3.8 (old I know) but all my results are type 1.
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Old 2019-03-16, 14:07   #4
Prime95
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Quote:
Originally Posted by S485122 View Post
This is not supposed to happen. Both PRP's have been done this year, I suppose with mature software.
True, this isn't supposed to happen. Simon's machine is the trouble-maker. Fortunately, this led to a beefed up implementation of Gerbicz error checking in v29.6.
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Old 2019-03-16, 15:31   #5
kriesel
 
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Quote:
Originally Posted by endless mike View Post
I’m still on v3.8 (old I know) but all my results are type 1.
Smart. In some cases (exponent, gpu model, OS) V3.8 is the fastest available suitable version of gpuowl. See the pdf attachments at https://www.mersenneforum.org/showpo...35&postcount=2


Quote:
Originally Posted by Prime95 View Post
Simon's machine is the trouble-maker. Fortunately, this led to a beefed up implementation of Gerbicz error checking in v29.6.
A "canary in the coal mine" here and there is a good thing, alerting to issues that might not otherwise be found in time.

Last fiddled with by kriesel on 2019-03-16 at 15:33
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