mersenneforum.org  

Go Back   mersenneforum.org > Great Internet Mersenne Prime Search > Data

Reply
 
Thread Tools
Old 2020-11-26, 01:06   #1
alpertron
 
alpertron's Avatar
 
Aug 2002
Buenos Aires, Argentina

54C16 Posts
Default Too few factors found in 600M to 620M

I've just looked at https://www.mersenne.ca/status/tf/0/1/2/60000 and I found that there should be some hardware error:

21192 factors in the range 600M-610M today in the 72-bit range: only 3 factors found.
3268 factors in the range 610M-620M today in the 72-bit range: only 2 factors found.

In the first case there should be about 300 factors (maybe 200, but not 3). In the second case there should be about 45 factors, not 2.

It appears that the GPU being used is not helping the project.

Last fiddled with by alpertron on 2020-11-26 at 01:06
alpertron is offline   Reply With Quote
Old 2020-11-26, 02:13   #2
S485122
 
S485122's Avatar
 
Sep 2006
Brussels, Belgium

2·5·167 Posts
Default

Quote:
Originally Posted by alpertron View Post
I've just looked at https://www.mersenne.ca/status/tf/0/1/2/60000 and I found that there should be some hardware error:

21192 factors in the range 600M-610M today in the 72-bit range: only 3 factors found.
3268 factors in the range 610M-620M today in the 72-bit range: only 2 factors found.

In the first case there should be about 300 factors (maybe 200, but not 3). In the second case there should be about 45 factors, not 2.

It appears that the GPU being used is not helping the project.
Probably a case of submitting the results with factors found one day and the others the next. On the 24th, 162 successful and 0 unsuccessful attempts where reported in the 605M range.

Jacob
S485122 is offline   Reply With Quote
Old 2020-11-26, 02:25   #3
Mark Rose
 
Mark Rose's Avatar
 
"/X\(‘-‘)/X\"
Jan 2013

3×977 Posts
Default

Appears to be so. Looking over a week and the numbers look reasonable: https://www.mersenne.ca/status/tf/0/7/2/60000
Mark Rose is offline   Reply With Quote
Old 2020-11-26, 02:28   #4
alpertron
 
alpertron's Avatar
 
Aug 2002
Buenos Aires, Argentina

22×3×113 Posts
Default

Thanks. So this was a false alarm.
alpertron is offline   Reply With Quote
Old 2020-12-05, 04:39   #5
Madpoo
Serpentine Vermin Jar
 
Madpoo's Avatar
 
Jul 2014

1100110111012 Posts
Default

Quote:
Originally Posted by Mark Rose View Post
Appears to be so. Looking over a week and the numbers look reasonable: https://www.mersenne.ca/status/tf/0/7/2/60000
There are a few users who submit their factoring work in separate batches of "no factor" and "factor". No idea why, since it seems like extra work to filter them into the separate piles, but whatever.

So that does mean there are strange spikes in factors found. But the line does smooth out over longer periods of time, and that's where you'd look to try and spot weirdness.
Madpoo is offline   Reply With Quote
Old 2020-12-05, 08:59   #6
pinhodecarlos
 
pinhodecarlos's Avatar
 
"Carlos Pinho"
Oct 2011
Milton Keynes, UK

22×5×13×19 Posts
Default

SRBase uploads in batches, but not continuous since some assignments can have a delay by BOINC users, have seen a few with 45 days delay. Anyway, all ranges will get done eventually.
pinhodecarlos is online now   Reply With Quote
Old 2020-12-23, 09:12   #7
pinhodecarlos
 
pinhodecarlos's Avatar
 
"Carlos Pinho"
Oct 2011
Milton Keynes, UK

22×5×13×19 Posts
Default

Just using this thread to give you guys some feedback why the increase of SRBase output. There’s an interesting fight for third place at the boinc formula overall standings. Final figures within 8 days.
pinhodecarlos is online now   Reply With Quote
Old 2021-04-22, 20:38   #8
pinhodecarlos
 
pinhodecarlos's Avatar
 
"Carlos Pinho"
Oct 2011
Milton Keynes, UK

22·5·13·19 Posts
Default

To inform SRBase has been chosen for the next sprint challenge at formula boinc (23.04. 02:00 (UTC) - 26.04. 01:59 (UTC) ). This means you will see a spike on returned work which is now currently at 650M for 72-73 bits. ~500k wus or more expected to be completed.
pinhodecarlos is online now   Reply With Quote
Old 2021-05-02, 06:00   #9
pinhodecarlos
 
pinhodecarlos's Avatar
 
"Carlos Pinho"
Oct 2011
Milton Keynes, UK

115148 Posts
Default

From project:

Quote:
We have a successful run in TF which completed 1,345,106 tests in 3 days. This is around 20 times more than in normal state.
pinhodecarlos is online now   Reply With Quote
Old 2021-05-02, 06:35   #10
Uncwilly
6809 > 6502
 
Uncwilly's Avatar
 
"""""""""""""""""""
Aug 2003
101×103 Posts

33·5·71 Posts
Default

They have run through 3 bit levels in the 600M range in less than a year. Watching the Mersenne.ca 'video' is interesting. When they started, there was a lot of clean-up of straggler ranges. Then the steady march across bit levels. Next pass starting down in the 1xxM range will be neat to watch.
Uncwilly is offline   Reply With Quote
Old 2021-05-02, 07:16   #11
pinhodecarlos
 
pinhodecarlos's Avatar
 
"Carlos Pinho"
Oct 2011
Milton Keynes, UK

22·5·13·19 Posts
Default

It would be great to see SRBase been chosen for one of the GPU Boinc Penthalon disciplines, that would bring 50x more power or more during more days and help out clean 72-73 bits section. Yep, also looking forward to seeing this project impact on next bits level.

Last fiddled with by pinhodecarlos on 2021-05-02 at 07:19
pinhodecarlos is online now   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Nearly all Factors up to 2^71 found between 2.86 G and 2.96 G Kalli Hofmann Marin's Mersenne-aries 14 2021-04-12 13:12
No factors found aketilander PrimeNet 9 2011-05-17 11:32
CPU Time and Factors Found Rodrigo Operation Billion Digits 8 2010-08-14 20:36
500M-600M Range moo LMH > 100M 15 2005-10-21 01:10
How to find factors I found with TF? edorajh PrimeNet 3 2004-10-01 19:16

All times are UTC. The time now is 07:03.

Tue May 18 07:03:04 UTC 2021 up 40 days, 1:43, 0 users, load averages: 2.36, 1.99, 1.88

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.