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Old 2022-11-14, 16:32   #23
kriesel
 
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Quote:
Originally Posted by Prime95 View Post
If I did the query correctly:
So, no 100Mdigit exponents or thereabouts found with all LL tests by CUDALucas, for which 20000K would be a reasonable FFT size selection, and so make them suspect.

https://www.mersenne.org/report_ll/?...r_id=laurv&B1= shows lots of self-checking, probably gpuowl/CUDALucas pairs since they're nonzero and zero shift pairs, and an occasional different-user check in the verified exponents.

A gpuowl v6.11-380 result for M34643591 matched the previous two runs (the first is the outlier) https://www.mersenne.org/report_expo...4643591&full=1

Last fiddled with by kriesel on 2022-11-14 at 17:03
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Old 2022-11-14, 23:53   #24
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Default recheck thread

I've created a thread in my blog to track rechecks for the 74 flagged by George's query as CUDALucas-only verification, at https://mersenneforum.org/showthread.php?t=28237. Feel free to post claims & completions there, and I'll update post one of that thread as work progresses.
(I think a recheck of LaurV's monster will be a long time coming, but the rest look tractable.)
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Old 2022-11-15, 01:00   #25
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Just as a comment, those than I (Greg) did were run on nVidia Tesla hardware with ECC enabled both on the system and GPU memory. Doesn't make them error-proof but I would be very surprised if there's an error with matching residues with different shifts.
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Old 2022-11-15, 03:34   #26
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Quote:
Originally Posted by kriesel View Post
I've created a thread in my blog to track rechecks for the 74 flagged by George's query as CUDALucas-only verification, at https://mersenneforum.org/showthread.php?t=28237. Feel free to post claims & completions there, and I'll update post one of that thread as work progresses.
(I think a recheck of LaurV's monster will be a long time coming, but the rest look tractable.)
Ok, I will "owl" everything under 70M in two Rvii cards, for a start. As Mihai did his own FFT, the combination of cudaLucas+gpuOwl should be tought-proof in any case. Colab is no-go, as it became too expensive. Later, if no taker for the larger ones, I may adventure into 7xM too, depending on how long it takes for the smaller ones, but for now, please reserve for me only what's under 70M, all of them.
Please ignore, I went to the thread, I see people already jumping into it, so I will reserve there, to avoid stepping on toes.

On the other hand, here is the link for the files with the residues as discussed in the former post. You should NOT waste time on it, unless your name is George, hihi, but if you have itching on the fingers, you can download and see if you can reconstruct the bug in your card (need nVidia card and cudaLucas). I don't think is card-dependent, but I would be curious if older cufft/cudart libraries or versions of cudaLucas show this behavior. Anyhow, this is minor importance, I don't think it will help, except satisfying my personal curiosity.

About the zip: there are 4 files. The last two (with the larger iteration number) are not useful, except to confirm that you get the same residue after 10 iterations. The first two are the same file, except the FFT size inside is set to 19600k and 20M respectively (you can binary compare them to see what is changed), because the test is so fast that you don't have time to press the "f/F" to change the FFT. But you can change the FFT if you want. You have to rename the starting file (lower-iteration count) to c332329111 into your cudaLucas folder and run a test for this expo. The test takes less than a minute. You have to do this only for the 20M FFT, the other is provided as witness only. To see anything on screen you may change the output every 1 iteration, and checkpoint every 10.

Last fiddled with by LaurV on 2022-11-18 at 04:24
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Old 2022-11-15, 17:34   #27
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Quote:
Originally Posted by ATH View Post
Hmm I'm involved in 23 of the 74 exponents. I'm triple checking my lowest one now with Prime95 30.8 b17: 36532159
Are you running any more of your 23, or others? See https://mersenneforum.org/showpost.p...75&postcount=1 for coordination.

Last fiddled with by kriesel on 2022-11-15 at 17:35
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Old 2022-12-04, 19:04   #28
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Quote:
Originally Posted by sdbardwick View Post
All exponents appear to be assigned
I turned the crank and 1 exponent dribbled out.
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Old 2022-12-04, 19:26   #29
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Quote:
Originally Posted by Uncwilly View Post
I turned the crank and 1 exponent dribbled out.
And got snatched up...
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Old 2022-12-05, 16:17   #30
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Requesting another TC (again, LL only, please) for this one:

Code:
DoubleCheck=64714673,75,1
TIA
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Old 2022-12-05, 16:40   #31
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Quote:
Originally Posted by ric View Post
Requesting another TC (again, LL only, please) for this one:

Code:
DoubleCheck=64714673,75,1
TIA
Running. ETA 33 hours.

Last fiddled with by sdbardwick on 2022-12-05 at 16:41 Reason: updated ETA
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Old 2022-12-05, 18:04   #32
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Two more wild exponents have shown up. One is yet another suspect from anon.
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Old 2022-12-05, 19:33   #33
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Took all 3 remaining exponents. Should be done in about 5 days; 2 queued on slower non-FMA Xeon.

Last fiddled with by sdbardwick on 2022-12-05 at 19:43 Reason: Updated ETA
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