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Old 2021-11-29, 13:21   #430
Dr Sardonicus
 
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Quote:
Originally Posted by tuckerkao View Post
<snip>
It might be a symbolic exponent which indicate the hidden Mersenne Prime is close by
<snip>
If only you had found long beforehand the "symbolic exponents" indicating the "hidden" Mersenne prime exponents from 1398269 to 82589933 were close by!

Think - just think! how far the work of GIMPS would have been advanced by now!

N.B. Please don't bother us with them post facto.

Last fiddled with by Dr Sardonicus on 2021-11-29 at 13:22 Reason: w
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Old 2021-12-01, 23:23   #431
tuckerkao
 
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Quote:
Originally Posted by paulunderwood View Post
Like your guess at 168Mb for the next Mersenne prime, you are downright bad at guessing
I got pretty lucky on M168933833, found my factor of the month on day 1.
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Old 2021-12-04, 07:33   #432
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Quote:
Originally Posted by Dobri View Post
If the trial factoring of the palindromic 'symbolic exponent' M168929861 does not reveal a factor, then I may run a PRP test out of curiosity.
Looks like this exponent doesn't have any known factors below 2^79. ViliamF didn't find a factor from M168285323 either. Both will require the PRP tests to find out their primality.

M168280223, M168281023, M168283823, M168285823, M168288023 None of those exponents have revealed any factors so far. I don't think any addition TF efforts will be needed after 2^78 because M168286523 seemed to be factor resistant too.

I'm working on the PRP test of M168828523, very certain this one doesn't have any low hanging fruits below 2^144 either. One of my neighbor friends, a 17 years old boy who has a top end gaming computer suggested me during the Thanksgiving holiday to go after an exponent within the subrange which I've worked on with the least efforts(M168.8M). I originally planned to go after M168285823, then he had the idea to flip the 2858 to 8285.

I've been working on M168.8M since 11/25/2021, the total efforts already exceeded M168.5M as of now -
https://www.mersenne.ca/status/tf/0/20210201/4/16800 records on 12/03/2021
https://www.mersenne.ca/status/tf/20...210201/4/16800 records on 11/24/2021

Last fiddled with by tuckerkao on 2021-12-04 at 08:13
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Old 2021-12-07, 12:49   #433
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Very interesting, SRBase reserved the exponents only up to M168313421 - https://www.mersenne.org/report_expo...8314000&full=1
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Old 2021-12-08, 03:55   #434
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Quote:
Originally Posted by Dobri View Post
Tucker Kao is ok in my book. He is currently ranked 111th among the top producers, see https://www.mersenne.org/report_top_500/, which means that he truly can get others to do the work on exponents he likes.
If I have done my own part of the P-1, TF and PRP works which my machine can no longer take more, then I'll ask others to help. Until DDR5 memories become available again, I won't be able to acquire my new PC any time soon despite already paid full, it just sits in the merchant warehouse.
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Old 2021-12-09, 03:07   #435
tuckerkao
 
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Quote:
Originally Posted by Uncwilly View Post
According to mersenne.ca only 78 bits is recommended for the 160-170 range. So, during that time you could have done another exponent from null to 78 bits. It is better to take all the exponents in a desired range to the recommended bit level before taking any beyond that level. You will find an appropriate number of factors and get the biggest bang for your money. Also, doing so will allow any newer hardware do more of the heavy lifting. This is part of the strategy that has been employed in some other ranges.
The main reason I've tried to apply the larger P-1 bounds is to balance the higher TF bits which my current GPU is too slow to run them. My friends' computers may not always be available to me.

Although I've worked 1 bit lower than the recommended GPU72 TF, because of my P-1, the combined estimation is still in the positive zone - https://www.mersenne.ca/exponent/168828523

Does everyone see the screenshot below when he/she visits mersenne.ca or just me?
Attached Thumbnails
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Name:	Mersenne M168828523 on CA Server.png
Views:	36
Size:	101.7 KB
ID:	26194  

Last fiddled with by tuckerkao on 2021-12-09 at 04:06
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Old 2021-12-09, 04:30   #436
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I'm glad I've caught the screenshots and posted them here in time. Why is GPU72 trying to recommend the higher bits while I'm running the PRP(see the screenshot on the post above)?

I think the GPU72 recommendation is playing the tricks with me. Just checked another exponent which I didn't have the active PRP running and it's only recommended up to 278. See screenshot below for M168828823

Quote:
Originally Posted by Uncwilly View Post
Nope, don't care.
Looking at the records I see that you did 22,900 GHz-days of factoring on this exponent beyond the recommended TF level. And the PRP on this exponent takes ~1,145 Ghz-days. So the extra TF work wasted the compute that could have gone into ~20 more PRP's.

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Name:	Mersenne M168828823 on CA Server.png
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Last fiddled with by tuckerkao on 2021-12-09 at 04:48
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Old 2021-12-13, 23:05   #437
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Not an easy search, but I found it. M168654751 had been previously worked on by Team_Inspector. SRBase is finally mass trial factoring most of the M168M exponents from 2^73 to 2^74 and none of them are or will be M168,***,*23.
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Old 2021-12-14, 09:00   #438
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I certainly think it'll be a good idea to have ViliamF running TFs from 2^76 to 2^78 for the last 10 remaining M106M exponents - https://www.mersenne.org/assignments...chk=1&excert=1

M106314457 and M106316611 don't have the P-1 done.

Last fiddled with by tuckerkao on 2021-12-14 at 09:04
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Old 2021-12-14, 21:19   #439
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Quote:
Originally Posted by tuckerkao View Post
I certainly think it'll be a good idea to have ViliamF running TFs from 2^76 to 2^78 for the last 10 remaining M106M exponents - https://www.mersenne.org/assignments...chk=1&excert=1

M106314457 and M106316611 don't have the P-1 done.
At least you're funny.

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Old 2021-12-14, 21:27   #440
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This thing of trying to get others to do specific work (without lifting a finger) is getting old.
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