20080808, 19:16  #1 
Dec 2004
13×23 Posts 
Curious Prime Grid dump in secondpass
I was just curious about prime grids dump of 9500 tests totaling exactly 1M points.
Is this real or a stats glitch, also I was curious as to why Prime grid was doing double checks? Is it simply reissued tests from users who were late with tests or are they getting assigned doubles. 
20080808, 19:26  #2  
A Sunny Moo
Aug 2007
USA (GMT5)
3·2,083 Posts 
Quote:


20080808, 23:48  #3 
Jun 2008
2·5 Posts 
are we going to double check the result that PrimeGrid sends us on our own double check server? Or do we assume they are right because of the required quorum they have?

20080809, 04:21  #4 
A Sunny Moo
Aug 2007
USA (GMT5)
3×2,083 Posts 
Well, I would think that it's safe to assume that once you have two separate, matching residuals for the same number, the chances that the result is inaccurate is quite miniscule indeed. Not to mention that PrimeGrid is, in effect, doing the exact same thing that PSP is doing in its own doublecheckingnamely, considering a k/n pair verified when at least two matching residuals are hadthe only difference being that PrimeGrid is doing both its firstpass and doublecheck tests at the same time, rather than years apart.

20080809, 09:15  #5 
Apr 2003
772_{10} Posts 
We will not rerun any of the primegrid residues as with the quorum of 2 they test a pair until there are two matching residues.
And i have checked the points. It was really pure luck that the 9500 tests done by primegrid gave 1000000.00000 points. 
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