20090307, 07:45  #1 
Nov 2008
Rosenheim, Germany
2^{3}·3 Posts 
Reliability and confidence level
In GIMPS's assignment rules two terms are used: "confidence level" and "reliability". How are they defined and measured? Can I find the values of my CPUs somewhere?

20090307, 13:27  #2 
P90 years forever!
Aug 2002
Yeehaw, FL
3·2,281 Posts 
When you submit an LL result the reliability goes up if the run had no errors, it goes down if the LL run had errors. The confidence level is simply the number of LL tests you've reported (i.e. how confident the server is in the generated reliability score)
Last fiddled with by garo on 20090818 at 12:14 Reason: confidence>reliability 
20090307, 14:04  #3 
Nov 2008
Rosenheim, Germany
18_{16} Posts 
Thank you for responding.
Your explanation of "confidence level" is according to what I see in the statistics Prime Net is recording. But what is it about "reliability"? Many of our machines got 1.0. There are others which got 0.98. I didn't notice any error reports by these machines (in prime.log or results.txt). Where does the difference come from? 
20090307, 17:47  #4 
P90 years forever!
Aug 2002
Yeehaw, FL
3·2,281 Posts 
Actually, reliability is a rolling average. You get 1.0 for a successful doublecheck. You get a 0.0 for a proven bad result (should only happen if someone verified the exponent before you submitted your result). You get 0.5 (I think) for an error plagued unverified test. You get 0.98 for a unverified LL test.

20090308, 06:51  #5  
Feb 2009
73_{10} Posts 
Quote:


20090308, 13:00  #6 
P90 years forever!
Aug 2002
Yeehaw, FL
3·2,281 Posts 
No changes are made to either machine. I only look at the error code returned with an LL test.

20090811, 04:04  #7  
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
4,289 Posts 
Quote:
3 under "Verified LL Results"  1 was a Verified DC  1 had 2 rounding errors that it recovered from and ended up being a Verified LL  the third had no errors and was verified 1 under "Unverified LL Results"  error code is blank 0 under "Bad test results" So I think there should be a rolling average of: 0.98 for the unverified LL 1.00 for the successful DC ......... and if I get nothing for an unverified LL and 0.45 (rather than 0.5) for the verified LL with 2 rounding errors =============== Then it comes out to the 0.81 I have. It this possibly correct? Thanks 

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