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Search: Posts Made By: nordi
Forum: Data 2021-05-05, 22:17
Replies: 99
Views: 3,152
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: 99
Views: 3,152
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: 291
Views: 22,886
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: 291
Views: 22,886
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: 99
Views: 3,152
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: 99
Views: 3,152
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: 620
Sticky: mersenne.ca
Views: 73,115
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: 291
Views: 22,886
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: 620
Sticky: mersenne.ca
Views: 73,115
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: 291
Views: 22,886
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: 291
Views: 22,886
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: 291
Views: 22,886
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: 620
Sticky: mersenne.ca
Views: 73,115
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: 620
Sticky: mersenne.ca
Views: 73,115
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: 620
Sticky: mersenne.ca
Views: 73,115
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: 620
Sticky: mersenne.ca
Views: 73,115
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: 291
Views: 22,886
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: 291
Views: 22,886
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: 291
Views: 22,886
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: 445
Views: 66,671
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: 445
Views: 66,671
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: 445
Views: 66,671
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: 445
Views: 66,671
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.
Forum: Data 2020-12-27, 14:24
Replies: 445
Views: 66,671
Posted By nordi
I tried again on Linux and mprime kept running...

I tried again on Linux and mprime kept running much longer than before, but was still stopped by the kernel's OOM killer. It used 121GB when configured to use just 50.


One thing I noticed is...
Forum: Hardware 2020-12-22, 21:35
Replies: 2
Views: 769
Posted By nordi
That was also my thought, especially considering...

That was also my thought, especially considering the 45W TDP and 8 memory channels! The same money for an AMD Epyc will get you half the cores at around twice the clockspeed (=same performance?), but...
Showing results 1 to 25 of 71

 
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