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Old 2021-03-06, 06:49   #1
Rodrigo
 
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Jun 2010
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Exclamation I've been quarantined!

No, this is not a COVID-19 thread.

Tonight I reported a batch of TF results, and at the bottom of the page was a notice in red boldface that said:

[see attachment below]

Never seen anything like this before, and I'm sure that over the years I've submitted batches with equally "unusual" factor rates. Is this something new? A forum search for "quarantine" yielded only pandemic-related results.

Comments welcome.
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Old 2021-03-06, 15:25   #2
Viliam Furik
 
"Viliam Furík"
Jul 2018
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Wow, that must be some new feature... What exponent range are you doing TF in? I noticed from the picture the bit depth is 74, for the one factor you found. So I guess you are doing TF for exponents in the 104M range (or somewhere near), is that right?

If so, then I don't think that should be something abnormal unless it happened more than once, but even then, random distribution doesn't always behave as we would like.

I think the suspicion bound should be at most 0.25%.
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Old 2021-03-06, 16:22   #3
petrw1
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"Wayne"
Nov 2006
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Quote:
Originally Posted by Rodrigo View Post
No, this is not a COVID-19 thread.

Tonight I reported a batch of TF results, and at the bottom of the page was a notice in red boldface that said:

[see attachment below]

Never seen anything like this before, and I'm sure that over the years I've submitted batches with equally "unusual" factor rates. Is this something new? A forum search for "quarantine" yielded only pandemic-related results.

Comments welcome.
I've been GPU-TF'ing for a few years now in ranges that have had decent P-1.
I'm averaging 1% success rate ... however ...
36 times I went more than 255 exponents without a factor; as high as 633.
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Old 2021-03-06, 16:22   #4
ixfd64
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Dec 2002
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Probably related to this thread: https://mersenneforum.org/showthread.php?t=24103
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Old 2021-03-06, 16:43   #5
Rodrigo
 
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Jun 2010
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Quote:
Originally Posted by Viliam Furik View Post
Wow, that must be some new feature... What exponent range are you doing TF in? I noticed from the picture the bit depth is 74, for the one factor you found. So I guess you are doing TF for exponents in the 104M range (or somewhere near), is that right?

If so, then I don't think that should be something abnormal unless it happened more than once, but even then, random distribution doesn't always behave as we would like.

I think the suspicion bound should be at most 0.25%.
Thanks. FWIW, it was in the 208M range.
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Old 2021-03-06, 17:09   #6
Rodrigo
 
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Quote:
Originally Posted by ixfd64 View Post
Probably related to this thread: https://mersenneforum.org/showthread.php?t=24103
That made for some pretty interesting reading.
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