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Old 2020-11-26, 01:06   #1
alpertron
 
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Default Too few factors found in 600M to 620M

I've just looked at https://www.mersenne.ca/status/tf/0/1/2/60000 and I found that there should be some hardware error:

21192 factors in the range 600M-610M today in the 72-bit range: only 3 factors found.
3268 factors in the range 610M-620M today in the 72-bit range: only 2 factors found.

In the first case there should be about 300 factors (maybe 200, but not 3). In the second case there should be about 45 factors, not 2.

It appears that the GPU being used is not helping the project.

Last fiddled with by alpertron on 2020-11-26 at 01:06
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Old 2020-11-26, 02:13   #2
S485122
 
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Quote:
Originally Posted by alpertron View Post
I've just looked at https://www.mersenne.ca/status/tf/0/1/2/60000 and I found that there should be some hardware error:

21192 factors in the range 600M-610M today in the 72-bit range: only 3 factors found.
3268 factors in the range 610M-620M today in the 72-bit range: only 2 factors found.

In the first case there should be about 300 factors (maybe 200, but not 3). In the second case there should be about 45 factors, not 2.

It appears that the GPU being used is not helping the project.
Probably a case of submitting the results with factors found one day and the others the next. On the 24th, 162 successful and 0 unsuccessful attempts where reported in the 605M range.

Jacob
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Old 2020-11-26, 02:25   #3
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Appears to be so. Looking over a week and the numbers look reasonable: https://www.mersenne.ca/status/tf/0/7/2/60000
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Old 2020-11-26, 02:28   #4
alpertron
 
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Thanks. So this was a false alarm.
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Old 2020-12-05, 04:39   #5
Madpoo
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Quote:
Originally Posted by Mark Rose View Post
Appears to be so. Looking over a week and the numbers look reasonable: https://www.mersenne.ca/status/tf/0/7/2/60000
There are a few users who submit their factoring work in separate batches of "no factor" and "factor". No idea why, since it seems like extra work to filter them into the separate piles, but whatever.

So that does mean there are strange spikes in factors found. But the line does smooth out over longer periods of time, and that's where you'd look to try and spot weirdness.
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Old 2020-12-05, 08:59   #6
pinhodecarlos
 
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SRBase uploads in batches, but not continuous since some assignments can have a delay by BOINC users, have seen a few with 45 days delay. Anyway, all ranges will get done eventually.
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Old 2020-12-23, 09:12   #7
pinhodecarlos
 
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Just using this thread to give you guys some feedback why the increase of SRBase output. There’s an interesting fight for third place at the boinc formula overall standings. Final figures within 8 days.
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