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Forum: Information & Answers 2022-01-17, 19:18
Replies: 3
Views: 135
Posted By bur
edit: I realized it's obviously visible from the...

edit: I realized it's obviously visible from the stats if someone completed that range after a factor was found.


Ok, I can see how that makes sense for the goal of finding primes. But isn't it a...
Forum: Information & Answers 2022-01-16, 17:18
Replies: 3
Views: 135
Posted By bur
What happens when factors are found by TF or ECM

I recently ran TF via a colab session and it found a factor. I didn't observe it when it happened, only afterwards from the results. From that same results page of my Primenet account I saw that it...
Forum: GPU to 72 2022-01-16, 08:15
Replies: 285
Views: 54,412
Posted By bur
Yep, I never got T4s before, only K80 which take...

Yep, I never got T4s before, only K80 which take about 4 h per 72-72 bit TF, but the last couple of days it was always a T4 which finishes in 45 min. Maybe Google upgraded the hardware and now more...
Forum: CADO-NFS 2022-01-13, 18:55
Replies: 88
Views: 15,530
Posted By bur
Thanks, the c167 took 12 days of sieving, the...

Thanks, the c167 took 12 days of sieving, the c170 had enough relations already after 15 days, much faster than I anticipated also from c150 and c160 jobs on that machine.


Anyway, I tried again...
Forum: CADO-NFS 2022-01-13, 08:51
Replies: 88
Views: 15,530
Posted By bur
Second attempt with 230M rels and 162M uniques,...

Second attempt with 230M rels and 162M uniques, it went through to the full merge, but quit there. So it's getting closer.

Btw, if C165 to C170 will double the sieving time, what is the time ratio...
Forum: CADO-NFS 2022-01-12, 17:53
Replies: 88
Views: 15,530
Posted By bur
Thanks, but msieve has no equivalent to...

Thanks, but msieve has no equivalent to required_excess?


The first attempt failed as expected. I had 154M uniques (the recent C167 took 152M):
Wed Jan 12 16:44:33 2022 keeping 41220401 ideals...
Forum: Msieve 2022-01-12, 12:44
Replies: 2
Views: 78
Posted By bur
Ok, thanks! So far I dev/null'ed the output when...

Ok, thanks! So far I dev/null'ed the output when checking the uniques ratio during sieving, so that's good to know.
Forum: Msieve 2022-01-12, 09:53
Replies: 2
Views: 78
Posted By bur
Using remdups to feed uniques to msieve

I read that various people use remdups for duplicate filtering and hand only the uniques over to msieve. As an advantage it was said that it saves time if you run msieve more than once on the same...
Forum: CADO-NFS 2022-01-12, 08:31
Replies: 88
Views: 15,530
Posted By bur
Curtis, you suggested excess of 0.05 for building...

Curtis, you suggested excess of 0.05 for building the matrix with CADO. For msieve I think the same effect is achieved with target-density? What would be a good value? Charybdis used target_density =...
Forum: Operazione Doppi Mersennes 2022-01-12, 07:42
Replies: 65
Views: 33,597
Posted By bur
Ah, thanks. So the k in the table are those...

Ah, thanks.

So the k in the table are those that might be prime? For example the first entry tells me that 2*1618932*2^M34+1 has no factor smaller than 210T?


Then what does this mean:

"All...
Forum: CADO-NFS 2022-01-11, 11:02
Replies: 88
Views: 15,530
Posted By bur
So the poly influences the uniques ratio, but...

So the poly influences the uniques ratio, but "random" meaning not depending on the score? Is the same true for the required number of uniques? This would mean that a slightly lower scoring poly...
Forum: Riesel Prime Search 2022-01-11, 09:53
Replies: 297
Views: 53,575
Posted By bur
New factorial prime

A new factorial prime was recently reported (https://primes.utm.edu/primes/page.php?id=133139) (not yet validated):

288465! + 1

It is very close to the PRPnet search wavefront, is that a...
Forum: Operazione Doppi Mersennes 2022-01-10, 15:35
Replies: 65
Views: 33,597
Posted By bur
I still don't 100% get it. What are the numbers,...

I still don't 100% get it. What are the numbers, values of k? So k=1618932 in combination with p=1257787 has been sived to 210T and k=60 in combination with p=32582657 has been sieved to 370T?

If...
Forum: Operazione Doppi Mersennes 2022-01-10, 09:42
Replies: 65
Views: 33,597
Posted By bur
I have been pondering over the deep sieve stats...

I have been pondering over the deep sieve stats (http://www.doublemersennes.org/sieving/validi.php) for a while, but don't understand them.

I assume the colors of the columns indicate up to which...
Forum: CADO-NFS 2022-01-10, 08:14
Replies: 88
Views: 15,530
Posted By bur
I'm at 190M relations of which 69.7% or 132M are...

I'm at 190M relations of which 69.7% or 132M are unique. The C167 took 152M uniques to build a matrix, what number of uniqes can I expect for a C170?

Is the necessary number of uniques just a...
Forum: Lone Mersenne Hunters 2022-01-07, 07:45
Replies: 2,034
Views: 281,692
Posted By bur
Das ist korrekt. In other news, I got...

Das ist korrekt.


In other news, I got excited about a 51 digit P-1 factor. Turned out it were two factors, but that's still nice, especially since it came from free Colab via GPU72:

M21747997...
Forum: CADO-NFS 2022-01-05, 18:17
Replies: 88
Views: 15,530
Posted By bur
Ok, thanks. For the C167 the q-min which lead to...

Ok, thanks. For the C167 the q-min which lead to the smallest required q-range had a ratio of about 6. Maybe it'll be interesting to do a similar test on this C170, or is there already enough...
Forum: CADO-NFS 2022-01-05, 15:16
Replies: 88
Views: 15,530
Posted By bur
Sieving of the C170 is proceeding fine, I'm at...

Sieving of the C170 is proceeding fine, I'm at 121M rels, q = 46M. The yield per 5000 q varies quite strongly, just the last three workunits had 20273, 15446 and 17053, respectively.

I noticed...
Forum: PARI/GP 2022-01-05, 12:42
Replies: 5
Views: 473
Posted By bur
Yes, I am in contact with them, it should be...

Yes, I am in contact with them, it should be possible to have it run multithreaded.

He also wrote that the certificate can be generated in steps. I am not sure if these steps are independent,...
Forum: PARI/GP 2022-01-05, 08:48
Replies: 5
Views: 473
Posted By bur
I found this presentation ...

I found this presentation (http://147.210.16.88/Events/PARI2018/talks/ecpp.pdf) by Jared Asuncion. According to them, the speed they achieved is even higher than that of Primo. At least of the...
Forum: PARI/GP 2022-01-04, 10:29
Replies: 5
Views: 473
Posted By bur
Ah, thanks. Number already proven just means that...

Ah, thanks. Number already proven just means that in the meantime the number was proven prime. I tested your suggestion with another number and it works.
Forum: And now for something completely different 2022-01-04, 09:41
Replies: 93
Views: 27,883
Posted By bur
I opened a thread...

I opened a thread (https://www.mersenneforum.org/showthread.php?t=27460) in the PAIR/GP subforum, so please these two posts could be removed.
Forum: PARI/GP 2022-01-04, 09:40
Replies: 5
Views: 473
Posted By bur
primecert() vs Primo

My main issue with Primo is that is requires a GUI. I recently found out that PARI offers an ECPP test via primecert(). How fast is it compared to Primo? In another thread...
Forum: And now for something completely different 2022-01-03, 10:07
Replies: 93
Views: 27,883
Posted By bur
I didn't know PARI supported ECPP certificates...

I didn't know PARI supported ECPP certificates out of the box. Does anyone know how fast it is compared to Primo? And how to make it run multithreaded?

It would be very nice to have an efficient...
Forum: CADO-NFS 2021-12-30, 06:48
Replies: 63
Views: 18,290
Posted By bur
Thanks for the info, I still don't know enough...

Thanks for the info, I still don't know enough about GNFS to understand why the settings are what they are. I get the general concept, but things like the factorbase I'll have to do some more reading...
Showing results 1 to 25 of 477

 
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