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Old 2016-07-29, 16:22   #111
Mark Rose
 
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Quote:
Originally Posted by Madpoo View Post
I think it's safe to say the "factored to xx bits" is accurate, we just won't always have the full history of who did what bit ranges.

Unless it really is a case of sometimes that history info isn't logged properly, even on the current v5 Primenet. I haven't poked my head into those parts of the site/API to consider how that might occur, if at all.
From the hundreds of thousands of exponents I looked at, I came to some conclusions:

If it says "no factor to 2^63" in the history, it's almost always correct.

If it says "no factor to 2^63" and "no factor from 2^64 to 2^65", it's very likely the work from 2^63 to 2^64 was done.

If there is a gap in the history, like "no factor from 2^70 to 2^71" then "no factor from 2^72 to 2^73", then it's very likely the work from 2^71 to 2^72 was never done. I went through and filled in all the gaps from 100000 to 100M. More may have appeared in the last six months. I haven't checked.

I found several thousand missed factors, in the 5M to 35M, IIRC. I didn't find any trend of missed factors above 40M.
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Old 2016-07-29, 16:28   #112
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Quote:
Originally Posted by Mark Rose View Post
If there is a gap in the history, like "no factor from 2^70 to 2^71" then "no factor from 2^72 to 2^73", then it's very likely the work from 2^71 to 2^72 was never done.
I actually don't think so. When I was looking at the history records a few months ago I believe the problem was actually that 71-72 and 72-73 were done by the same person as separate bitlevels and manually reported at the same time (i.e. sequential results lines) and they ended up being received by the server with identical timestamps and thereby one of the results being suppressed from the report.
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Old 2016-07-29, 17:41   #113
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Quote:
Originally Posted by James Heinrich View Post
I actually don't think so. When I was looking at the history records a few months ago I believe the problem was actually that 71-72 and 72-73 were done by the same person as separate bitlevels and manually reported at the same time (i.e. sequential results lines) and they ended up being received by the server with identical timestamps and thereby one of the results being suppressed from the report.
It depends on the range. In the very low exponents, in the <15M neighbourhood, I found thousands of exponents where the bit level was skipped, and I was getting the expected number of factors doing the skipped work.

The higher stuff was all good.
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Old 2016-07-29, 19:33   #114
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Yes, that's what I meant. 15M shouldn't be going to 73
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Old 2016-07-29, 19:53   #115
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Quote:
Originally Posted by James Heinrich View Post
Yes, that's what I meant. 15M shouldn't be going to 73
73 was an example number, that's all :)
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Old 2017-02-14, 14:02   #116
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http://www.mersenne.ca/status/tf

Not being updated.
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Old 2017-02-14, 16:08   #117
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Thanks. I believe I found the problem -- I had to reparse PrimeNet results from two days prior (an extraordinarily-large P-1 factor was found that wasn't being exported correctly), and once I did the automated import script ended up being two days behind. I'm rerunning the sync for the missing 2 days now.
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Old 2017-02-14, 17:17   #118
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Should be up to date and working now (albeit that the intervening numbers from Feb 11-13 are copied from adjacent days).
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Old 2017-02-14, 21:51   #119
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Thanks...

I also noticed for some time now that the databases seem not to be quite in sync. For example here http://www.mersenne.ca/status/tf/0/0/1/0 it shows in the 67bit column 4 remaining exponents in the 100M range whereas here http://www.mersenne.org/report_facto...=1&tftobits=70 they are no longer listed.
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Old 2017-02-14, 21:52   #120
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Thx a bunch. Fast and effective as usual
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Old 2017-02-14, 22:02   #121
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Quote:
Originally Posted by ramgeis View Post
I also noticed for some time now that the databases seem not to be quite in sync. For example here http://www.mersenne.ca/status/tf/0/0/1/0 it shows in the 67bit column 4 remaining exponents in the 100M range whereas here http://www.mersenne.org/report_facto...=1&tftobits=70 they are no longer listed.
I know why that is, but not why that is.

The 4 exponents in question:
173973797
174314669
174503893
174534593
If you look on the PrimeNet report of those, you'll see a "no factor from X to Y" report between 2^63 and 2^67, and yet PrimeNet claims "No factors below 2^68". How or why that can happen I can't say. Since mersenne.ca is only updated by logged results submitted (and 67-68 wasn't logged at least) mersenne.ca doesn't know about it being purportedly factorted to 2^68.
It might not hurt for someone to re-run 67-68 on those 4 exponents just to make sure it's really been done, and that would also fix the unsynch between mersenne.org and mersenne.ca
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