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Search: Posts Made By: nordi
Forum: Hardware 2021-06-02, 18:51
Replies: 14
Views: 493
Posted By nordi
This graphic...

This graphic (https://images.anandtech.com/doci/16214/Zen3_arch_20.jpg) from Anandtech's Zen3 deep dive shows "32B / cycle" as L3 bandwith per core. At 4Ghz, that's 128GB/s, which is in line with...
Forum: mersenne.ca 2021-05-18, 18:29
Replies: 640
Sticky: mersenne.ca
Views: 79,107
Posted By nordi
It is possible. The new factors for M1,924,751...

It is possible. The new factors for M1,924,751 (https://www.mersenne.ca/exponent/1924751) and M92,419 (https://www.mersenne.ca/exponent/92419) are P+1 smooth and also reasonably P-1 smooth.
Forum: Data 2021-05-05, 22:17
Replies: 107
Views: 4,980
Posted By nordi
That would explain ...

That would explain
https://www.mersenne.ca/exponent/399953

I also seems that some P-1 has been done up to 500k:
https://www.mersenne.ca/exponent/499679
https://www.mersenne.ca/exponent/499649
...
Forum: Data 2021-05-01, 16:20
Replies: 107
Views: 4,980
Posted By nordi
I did a test run on exponents with known factors...

I did a test run on exponents with known factors in the 90-100k and 295-305k ranges. I made 2 runs on the 1393 exponents in these ranges: First with start=2/7, then with start=6/5. The run just...
Forum: Software 2021-05-01, 15:46
Replies: 312
Views: 28,529
Posted By nordi
One number is actually missing from the P+1...

One number is actually missing from the P+1 report (https://www.mersenne.org/report_pplus1/): a factor was found for M92459 (https://www.mersenne.org/report_exponent/?exp_lo=92459&full=1) . It was...
Forum: Software 2021-04-30, 17:00
Replies: 312
Views: 28,529
Posted By nordi
Maybe you should try "UnreserveExponents=999",...

Maybe you should try "UnreserveExponents=999", which does the opposite of what the name implies: It protects 999 exponents per worker from bein unreserved. I set it on my system because mprime kept...
Forum: Data 2021-04-29, 22:45
Replies: 107
Views: 4,980
Posted By nordi
This factor is actually so P+1 smooth that it was...

This factor is actually so P+1 smooth that it was found in stage 1:

543259182333011804411673092327891767 + 1 = 2 x 2 x 2 x 11 x 6133 x 78173 x 411667 x 758189 x 1997101 x 20657183

That's why...
Forum: Data 2021-04-28, 21:48
Replies: 107
Views: 4,980
Posted By nordi
Out of those numbers, I already did all exponents...

Out of those numbers, I already did all exponents in the 90k-100k and 295k-305k range as an experiment. The second run on those is already in progress. So please remove them from the list / don't...
Forum: mersenne.ca 2021-04-23, 13:17
Replies: 640
Sticky: mersenne.ca
Views: 79,107
Posted By nordi
@James: Maybe you are just doing some testing...

@James: Maybe you are just doing some testing right now, but https://www.mersenne.ca/exponent/287873 shows some debug info that probably should not be there.
Forum: Software 2021-04-23, 11:15
Replies: 312
Views: 28,529
Posted By nordi
Another two factors found with P+1. One is P-1...

Another two factors found with P+1. One is P-1 smooth:

M1601783 (https://www.mersenne.org/report_exponent/?exp_lo=1601783&full=1): 5920048152491971978196689064497 - 1 = 2^4 x 3 x 191 x 6637 x...
Forum: mersenne.ca 2021-04-22, 22:20
Replies: 640
Sticky: mersenne.ca
Views: 79,107
Posted By nordi
Regarding the B1/B2 choice, available RAM is...

Regarding the B1/B2 choice, available RAM is currently the limit for me. I chose B1 as 40 times the B1 of the current ECM work and B2 = 50 * B1. In stage 2, that uses 2GB for already factored...
Forum: Software 2021-04-22, 15:26
Replies: 312
Views: 28,529
Posted By nordi
Since it is not possible to reserve work for P+1,...

Since it is not possible to reserve work for P+1, I'd like to unofficially reserve


all already factored exponents from 95k-100k
all already factored exponents from 295k-300k

I'll run a...
Forum: Software 2021-04-22, 06:59
Replies: 312
Views: 28,529
Posted By nordi
I got the first new factor with PP1: P+1...

I got the first new factor with PP1:

P+1 found a factor in stage #2, B1=10000000, B2=1000000000.
M287873 (https://www.mersenne.org/report_exponent/?exp_lo=287873&full=1) has a factor:...
Forum: Software 2021-04-21, 22:00
Replies: 312
Views: 28,529
Posted By nordi
I'm testing PP1 with 30.6b2 on Linux and it looks...

I'm testing PP1 with 30.6b2 on Linux and it looks good so far. Resuming in stage 2 worked and I can see the results on mersenne.org. :smile:

The only thing that's missing is automated work...
Forum: mersenne.ca 2021-04-20, 20:55
Replies: 640
Sticky: mersenne.ca
Views: 79,107
Posted By nordi
I found some issues with the PRP status: ...

I found some issues with the PRP status:

M13896137, (https://www.mersenne.ca/exponent/13896137)M1514537 (https://www.mersenne.ca/exponent/15145379), and M15356531...
Forum: mersenne.ca 2021-04-10, 17:11
Replies: 640
Sticky: mersenne.ca
Views: 79,107
Posted By nordi
Thanks for the quick response! That would...

Thanks for the quick response!

That would also explain why both the P-1 and the ECM for M1481 did show on mersenne.ca: They were recorded 1 second apart, while the data for M1217 was recorded in...
Forum: mersenne.ca 2021-04-08, 17:15
Replies: 640
Sticky: mersenne.ca
Views: 79,107
Posted By nordi
Mersenne.ca is missing some ECM curves that I...

Mersenne.ca is missing some ECM curves that I completed for M1217: PrimeNet shows them for 2021-03-27 (https://www.mersenne.org/report_exponent/?exp_lo=1217&exp_hi=&full=1&ecmhist=1), but they are...
Forum: mersenne.ca 2021-02-26, 19:51
Replies: 640
Sticky: mersenne.ca
Views: 79,107
Posted By nordi
Nice! I also did not know about this page. To...

Nice! I also did not know about this page. To make it even better, could you filter out the exponents that are already fully factored?
Forum: Software 2021-01-25, 10:05
Replies: 312
Views: 28,529
Posted By nordi
I got a crash with build 7 doing ECM work on...

I got a crash with build 7 doing ECM work on Linux:

show_signal_msg: 17 callbacks suppressed
mprime[18320]: segfault at 7fd563f78000 ip 00000000004511b2 sp 00007ff0cc98f860 error 6 in...
Forum: Software 2021-01-04, 19:45
Replies: 312
Views: 28,529
Posted By nordi
I was also running into OOM problems when testing...

I was also running into OOM problems when testing earlier builds of 30.4. They were supposed to be fixed in the new version, though. Which operating system are you using?
Forum: Software 2021-01-04, 19:29
Replies: 312
Views: 28,529
Posted By nordi
I tried out the PracSearch parameter and compared...

I tried out the PracSearch parameter and compared the perfomance of stage 1 in 30.4b5 against version 29.8, using my Ryzen 3950X (=Zen2 architecture):

M1277


PracSearch=1 52.7s
...
Forum: Data 2020-12-31, 16:01
Replies: 484
Views: 75,554
Posted By nordi
I finally got the benchmarks done. For ...

I finally got the benchmarks done. For

ECM2=N/A,1,2,1619,-1,10000000,100000000,1,

which uses FMA3 FFT length 96 on my Ryzen 3950X with 16 cores, I had these results:

16 workers:


...
Forum: Data 2020-12-31, 14:37
Replies: 484
Views: 75,554
Posted By nordi
While investigating the segfault issue, I found...

While investigating the segfault issue, I found that when doing

ECM2=N/A,1,2,11,-1,100000000,1000000000,1

the factor is found and then mprime goes to waiting mode. When I stop it with CTRL+C, I...
Forum: Data 2020-12-31, 14:20
Replies: 484
Views: 75,554
Posted By nordi
The new code seems to have a race condition...

The new code seems to have a race condition during startup that segfaults mprime roughly 1 out of 10 times on my system. I have


32 workers, configured to run...
Forum: Data 2020-12-27, 17:48
Replies: 484
Views: 75,554
Posted By nordi
Yes, 32 workers with "Memory=50000" in local.txt....

Yes, 32 workers with "Memory=50000" in local.txt. The MaxHighMemWorkers is not set in my config. The machine has 128GB of RAM.
That and the worktodo were sent via PM.
Showing results 1 to 25 of 73

 
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