From PrimeGrid News Archive: (http://feedproxy.google.com/~r/PrimeGrid/~3/lw0yfWhWepM/all_news.php)
11 May 09:
We have released first PrimeGrid application for Mac OS X, Arithmetic Progression of 26 Primes Search (AP26). Mac OS X 10.3 running on PPC, 10.4 running on Intel and 64bit 10.5 running on Intel are supported.
Thanks to Iain Bethune for compiling the apps.
From PrimeGrid News Archive: (http://feedproxy.google.com/~r/PrimeGrid/~3/T50kXGlWx08/all_news.php)
17 May 09:
We are going to have a one to two hour downtime tomorrow, May 18, at about 12:00 GMT, because the servers have to be moved to a different rack as the datacenter is upgrading their infrastructure.
Note form Cruncher Pete: 12:00GMT on May 18 equates to 10:00 E.S.T on 19 May 09. This will also effect BOINCStats as they are co-located in the same building.
From the Prime Grid News Feed:
2009-06-07 06:30 UTC
PrimeGrid's Birthday/Summer Solstice Challenge
PrimeGrid's Challenge series (http://www.primegrid.com/challenge/challenge.php) continues with the "Birthday/Summer Solstice Challenge". A 9 day Challenge is being offered on the Prime Sierpinski Problem (LLR) application. We are celebrating PrimeGrid's 4th birthday on 12 June...culminating 21 June on the Summer Solstice. It seems fitting that the sun will shine the longest for the project with the longest WU.
For more information, please see this forum post. (http://www.primegrid.com/forum_thread.php?id=1350&nowrap=true#15986)
From the Prime Grid news feed:
PrimeGrid's Birthday/Summer Solstice Challenge
Thursday, 11 Jun 2009 03:45:00 GMT
Just over 24 hours until the start of PrimeGrid's "Birthday/Summer Solstice Challenge". A 9 day Challenge is being offered on the Prime Sierpinski Problem (LLR) application. Long Challenge, long WU's, but the rewards are greater...250 Challenge points goes to the winner and should a prime be found, it will be a Mega Prime.
For more information, please see this forum post (http://www.primegrid.com/forum_thread.php?id=1350&nowrap=true#15986).
From the Prime Grid news feed:
GIMPS does it again!!!
Saturday, 13 Jun 2009 04:20:00 GMT
Congratulations to The Great Internet Mersenne Prime Search (GIMPS)! On April 12th, Odd Magnar Strindmo of Norway discovered the 47th known Mersenne prime, 2^42,643,801-1. It is the second largest known prime at 12,837,064 digits, only 141,125 digits smaller than the Mersenne prime found last August. The prime was independently verified June 12th.For more information, please visit the GIMPS site. Again, congratulations!!!
From the PrimeGrid news feed:
The sieves have been Mac'd out!
Monday 15 June 2009 03:25:00 GMT
321, PPS, and PSP sieves now have application support for Mac OS X 10.4 running on Intel and 10.5 running on 64bit Intel. PPS sieve also offers application support for Mac OS X 10.3 running on PPC.
From the PrimeGrid news feed:
New Top Host!
Saturday, 20 Jun 2009 02:05:00 GMT
Congratulations to Worldwide Center of Mathematics (http://www.primegrid.com/show_user.php?userid=40142), owner of the new top host (http://www.primegrid.com/show_host_detail.php?hostid=109305) at PrimeGrid. While this position has changed many times in the past, what makes this occasion unique is that this is the first time the top host is a Mac!!!EDIT: The above is in terms of RAC. In terms of total credit, UL1 (http://www.primegrid.com/show_user.php?userid=31306) holds a commanding lead of over 5M cobblestones with this host (http://www.primegrid.com/show_host_detail.php?hostid=102128).
From the PrimeGrid news feed:
Record AP24 Found
Posted: Tue, 30 Jun 2009 19:50:00 GMT
PrimeGrid has found a record AP24 (Arithmetic Progression of 24 primes). It is the largest known AP24. It has an ending term of 60312982868878297 surpassing the old record of 25490711550130537. The finder is (AFXTBA Pitheque) of France. He is a member of the L'Alliance Francophone team. The progression is written as 14992521666441877+8832442*23#*n for n=0..23. It was found in the AP26 Search.For more details on this find and the AP26 search, please see this forum post (http://www.primegrid.com/forum_thread.php?id=1246&nowrap=true#16522).
From the PrimeGrid news feed:
AP26 application available for Solaris
Posted: Wed, 01 Jul 2009 06:30:00 GMT
We have released a version of AP26 application for 64bit Solaris (on AMD x86_64 or Intel EM64T CPUs, platform name x86_64-pc-solaris). This is our first application for this platform, which also makes AP26 an application that runs on the most platforms. Thanks to Gerrit Slomma for building the app! Psst... the PS3 version is coming ;)
From the PrimeGrid news feed:
New AP24 Found
Posted: Mon, 06 Jul 2009 03:45:00 GMT
PrimeGrid has found a new AP24 (Arithmetic Progression of 24 primes). The finder is PaweÅ, FeruÅ› (mindc) of Poland. He is a member of the BOINC@Poland team. The progression is written as 5531900872160491+9383796*23#*n for n=0..23. It was found in the AP26 Search.
For more details on this find and the AP26 search, please see this forum post (http://www.primegrid.com/forum_thread.php?id=1246&nowrap=true#16628).
From the PrimeGrid news feed:
Record AP24 Found
Friday, 10 Jul 2009 14:15:00 GMT
PrimeGrid has found a record AP24 (Arithmetic Progression of 24 primes). It is the AP24 with smallest known start. It has a starting term of 39421708111691 decreasing the old record of 167806194923077. The finder is Mark Codding (Narwhal) of the United States. He is a member of Team Picard. The progression is written as 39421708111691+9740894*23#*n for n=0..23. It was found in the AP26 Search.For more details on this find and the AP26 search, please see this forum post (http://www.primegrid.com/forum_thread.php?id=1246&nowrap=true#16681).
From the PrimeGrid news feed:
The New Moon Challenge
Tuesday, 14 Jul 2009 18:25:00 GMT
PrimeGrid's Challenge Series (http://www.primegrid.com/challenge/challenge.php) continues with the New Moon Challenge. Please come join us in ushering in July's New Moon along with a new project to the Challenge Series. A 24 hour (21 July - 22 July) Challenge is being offered on PrimeGrid's AP26 (Arithmetic Progression of 26 primes) application. Builds are available for Linux, Mac, Windows, PS3, & Solaris. For more information, please see this forum thread (http://www.primegrid.com/forum_thread.php?id=1404&nowrap=true#16723).
P.S. Also, the "most significant" Solar Eclipse this century is occuring on 22 July. :) See forum thread (http://www.primegrid.com/forum_thread.php?id=1404&nowrap=true#16723) for more details.
From the PrimeGrid news feed:
New AP24 Found
Saturday, 18 Jul 2009 02:05:00 GMT
PrimeGrid has found a new AP24 (Arithmetic Progression of 24 primes). The finder is Carsten Hartwig (SG Arsenic) of the United Kingdom. He is a member of the SETI.Germany team. The progression is written as 19516186145019209+313705*23#*n for n=0..23. It was found in the AP26 Search.
For more details on this find and the AP26 search, please see this forum post (http://www.primegrid.com/forum_thread.php?id=1246&nowrap=true#16881).
From the PrimeGrid news feed:
PlayStation3 application
Saturday, 18 Jul 2009 18:35:00 GMT
We now have AP26 application for PlayStation 3. You may wish to check the forum thread (http://www.primegrid.com/forum_thread.php?id=1420) in order to get it running at full speed. Thanks to mfl0p.
From the PrimeGrid news feed:
Follow PrimeGrid on Twitter
Saturday, 18 Jul 2009 18:30:00 GMT
For those of you using Twitter, you can now follow PrimeGrid and watch the progress of recent findings in the AP26 Search. PrimeGrid Twitter on Web: http://www.twitter.com/primegrid. Thanks to Lexs for implementing the updates script.
From the PrimeGrid news feed:
100M Cobblestones
Saturday, 25 July 2009 12:40 AM
Congratulations to SETI.Germany, the first team to reach 100M cobblestones at PrimeGrid...doubling their 50M cobblestone achievement in only 5 1/2 months!!! Is 150M in their sights by year's end? We'll have to wait and see. Again, congratulations! :)
From the PrimeGrid news feed:
New AP24's Found
Saturday, 25 July 2009 4:35 AM
While there were no AP24+ found during the Challenge, two AP24's actually were found in the hours leading up to the start. The finders are Andreas Mohr (andmore) of Germany and Tina Kent (Penguirl) of the United States. Andreas' progression is written as 19471368812966089+410682*23#*n for n=0..23 and Tina's progression is written as 20909681071069667+234797*23#*n for n=0..23. Both were found in the AP26 Search.For more details on these finds and the AP26 search, please see the following forum posts: Andreas' AP24 (http://www.primegrid.com/forum_thread.php?id=1246&nowrap=true#17004) | Tina's AP24 (http://www.primegrid.com/forum_thread.php?id=1246&nowrap=true#17005).
From the PrimeGrid news feed:
New AP24 Found
Friday, 31 July 2009 12:10 AM
PrimeGrid has found a new AP24 (Arithmetic Progression of 24 primes). The finder is Jeffrey D Sessler (Tostada) of the United States. He is a member of team Ars Technica. The progression is written as 20187352211709911+1799216*23#*n for n=0..23. It was found in the AP26 Search.For more details on this find and the AP26 search, please see this forum post (http://www.primegrid.com/forum_thread.php?id=1246&nowrap=true#17142).
From the PrimeGrid news feed:
World Record Cullen Mega Prime returned
Sunday, 2 August 2009 1:40 AM
As unbelievable as it may sound, another Cullen Mega Prime has been discovered!!! It is only the 16th known Cullen prime. It is also a top 15 prime at over 2M digits and the largest found by LLR. Additionally, it is PrimeGrid's largest prime to date. The discoverer is from Japan and a member of Team 2ch. Verification is in progress. Stay tuned for more details.
From the PrimeGrid news feed:
New AP24 Found
Tuesday, 4 August 2009 3:05 AM
PrimeGrid has found a new AP24 (Arithmetic Progression of 24 primes)...the first by a PS3!!! The finder is Paolo Bassi ([FVG] bax) of Italy. He is a member of team BOINC.Italy. The progression is written as 25545151920212759+1140241*23#*n for n=0..23. It was found in the AP26 Search.
For more details on this find and the AP26 search, please see this forum post (http://www.primegrid.com/forum_thread.php?id=1246&nowrap=true#17227).
From the PrimeGrid news feed:
World Record Cullen Mega Prime found
Wednesday, 5 August 2009 12:45 PM
On 25 Jul 2009 1:11:48 UTC, PrimeGrid's Cullen Prime Search found another World Record Cullen Mega Prime:
6679881*26679881+1
The prime is 2,010,852 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 15th overall. It is the largest known Cullen prime and the largest found Mega Prime using LLR. This remarkable discovery comes less than 4 months after the last prime and is only the 16th known Cullen prime.Contact with PrimeGrid participant (spinner@) has not been returned. However, the participant is from Japan and is a member of Team 2ch. The prime was found using an Intel Xeon L5420 @ 2.50GHz with 6 GB RAM running Windows XP Professional. This computer took about 71 hours 58 minutes to complete the primality test.More details to come after contact is made.
From the PrimeGrid news feed:
World Record Twin Primes returned
Friday, 7 August 2009 2:20 AM
The search is finally over!!! The Twin Primes have been discovered!!! Verification was quickly completed and the appropriate users are being contacted. Credit will be shared between the finder, top producer in terms of M, top producer in terms of primes found, and top siever. The Twin Primes were actually returned on the SAME!!! day as the Cullen Prime but were overlooked in the excitement of the Cullen.Work generation has been terminated so please select another project if TPS was your only project. The project will remain active until all outstanding work has been returned and credited. Stay tuned for more details.
From the PrimeGrid news feed:
50M Cobblestones for SG Grid!!!
Monday, 10 August 2009 12:40 AM
Congratulations to SG Grid (http://www.primegrid.com/show_user.php?userid=32910), for becoming the first single user account to reach 50M cobblestones at PrimeGrid. An outstanding and amazing accomplishment after being here for less than 8 months.
Quote from: BF on August 12, 2009, 08:20:41 PM
Congratulations to SG Grid (http://www.primegrid.com/show_user.php?userid=32910), for becoming the first single user account to reach 50M cobblestones at PrimeGrid. An outstanding and amazing accomplishment after being here for less than 8 months.
the guy/ or girl, must have some amazing computers.. or a hell of a lot of them.. he (or she) has amassed a total of
106,295,496 credits in his/ her 5 projects that he/ she participates in , in only 8 months ! :shock
(an average of about 440,000 a day !)
From the PrimeGrid news feed:
Sophie Germain Prime Search
Monday, 17 August 2009 1:55 AM
The long awaited debut of the Sophie Germain Prime Search has finally arrived. To participate, select Sophie Germain Prime Search (LLR) on your PrimeGrid preferences page. For more information, please see this forum post (http://www.primegrid.com/forum_thread.php?id=1450&nowrap=true#17454).
From the PrimeGrid news feed:
The Dog Days of Summer Challenge
.
Monday, 17 August 2009 10:10 PM
The Dog Days are upon us! PrimeGrid's Challenge series continues with the Dog Days of Summer Challenge. Please come join us in ushering an end to the hot sweltering days of summer. A 5 day (18-23 August) Challenge is being offered on PrimeGrid's Woodall Prime Search (LLR)) application. Builds are available for Linux and Windows. For more information, please see this forum thread (http://www.primegrid.com/forum_thread.php?id=1440&nowrap=true#17226).
From the PrimeGrid news feed:
Record AP25 Found
Thursday, 3 September 2009 12:40 AM
PrimeGrid has found a record AP25 (Arithmetic Progression of 25 primes). This is PrimeGrid’s second AP25 and only the third known. It has an ending term of 37814740008933889 surpassing the old record of 15523154536267043. The finder is Jochen Beck (dh1saj) of Germany. He is a member of team SETI.Germany. The progression is written as 20919497549238289+3155495*23#*n for n=0..24. It was found in the AP26 Search. For more details on this find and the AP26 search, please see this forum post (http://www.primegrid.com/forum_thread.php?id=1246&nowrap=true#17828).
From the PrimeGrid news feed:
Megadigit Probable Prime Found
Thursday, 3 September 2009 10:00 AM
Congratulations to Ben Maloney (paleseptember) who discovered the megadigit probable prime 2^4583176+2131. At 1,379,674 decimal digits, this is the first known probable prime with over a million digits. It should soon appear as the new probable prime record at the website of Henri and Renaud Lifchitz, PRP Records: Probable Primes Top 10000.
Ben is participating in the project "Five or Bust" - The Dual Sierpinski Problem. This project is outside of PrimeGrid and can be located in the Mersenne forum. For additional information about this project, please see the Welcome to "Five or Bust!" (http://www.mersenneforum.org/showthread.php?t=10754) thread. There are only 2 remaining sequences. To help with PRP testing, see this thread (http://www.mersenneforum.org/showthread.php?t=10755). To help with sieving, see this thread (http://www.mersenneforum.org/showthread.php?t=10762).
PrimeGrid's 2010 Challenge Series. The Winter Solstice Challenge Start's... now!
http://www.primegrid.com/ :rocks
Congradulation's Brett!!! v:
2011-01-18: PrimeGrid - Mega Prime found for The Riesel Problem
On 14 Jan 2011 9:03:07 UTC, PrimeGrid?s The Riesel Problem project eliminated k=428639 by finding the Mega prime: 428639*2^3506452-1
The prime is 1,055,553 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 29th overall. This is the 2nd largest prime found in The Riesel Problem and PrimeGrid's second elimination in 2 months. 62 k's now remain.
The discovery was made by Brett Melvold of Australia using an Intel i7 920 @ 2.67GHz with 6GB RAM, running Windows 7. This computer took 11 hours and 13 minutes to complete the primality test using LLR. Brett is a member of the BOINC@AUSTRALIA team.
Quote from: Dataman on January 19, 2011, 06:56:13 AM
Brett is a member of the BOINC@AUSTRALIA team.
hmmm ... got me TWO of those machines.... makes me want to swap over to Primegrid ! :greet
actually - I shall go and do the 'build/ upgrade story' I want to do for the "Newcomers" section here... for those who may want to do some work of their own (save
BUCKS) but may also think it is a bit beyond them ---- well, it aint !
Is anyone else getting Computation errors? I've been trying to run the Proth Prime Search (Sieve) on ATI 4560 but they keep failing a few seconds in. When I check the work unit stats on their web page it shows that everyone with the duplicate tasks (sorry not sure what to call them) also gets the computation error. But nothing on their homepage that i can see. hmmm.. ???
All sweet here Sean. My 59xx is crunching without problems (touch wood)
Upgraded to Catalyst 11.6 recently, Sean?
The OpenCL drivers included with Catalyst 11.6 may be incompatible with Proth Prime Search (Sieve) v1.38 (ati13ati) tasks on HD 4xxx series cards.
You could try an earlier Catalyst version. Someone recommended 11.5 or 11.3 but not 11.2 or 11.4 for some reason.
Try installing Cat 11.5 or 11.3 first. If it still doesn't work and gives the same "Error: Building Program (clBuildProgram): Program build failure calclCompile failedError: Creating kernel start_ns failed!" you may need to run DriverSweeper or something similar to remove the OpenCL component of Catalyst 11.6 before installing Cat 11.5 or 11.3.
Thanks Kashi, I installed Windows 7 and Catalyst 11.6 yesterday so you are more then likely correct. What still confuses me is that when I view the tasks online and go to the work unit details it shows the states of the other duplicate tasks being crunched by other people as "In progress" or "Error while computing". ???
I will try the older Catalyst tomorrow as you suggested, I'm sure it will get it working again, and post back to let you know. thanks again.
It's not certain that an older driver will fix it, it is only a possibility that I gleaned from reading the PrimeGrid forums.
Yes it's very deceptive on PrimeGrid ATI currently. When you look at the details of the work units of your errored tasks, you often see many other tasks sent to wingmen that have also errored. This would lead you to believe that there is something wrong with the work units themselves because the iterations (tasks) appear to be erroring for almost everyone. However if you look closer at the errors you will see a pattern of HD 4xxx cards with Catalyst 11.6, a few HD 38XX incompatible with OpenCL, HD 57xx with something also incompatible, either Catalyst 11.6 or possibly an older driver with no APP section (OpenCL) and a lesser number of HD 58xx with errors.
But when you look at the details of work units of an ATI card that is successfully completing tasks, you will often see the same thing. Many errors in the tasks sent to wingmen. It's because there's a number of people with misconfigured/incompatible ATI cards on PrimeGrid currently and if the number of tasks sent to these cards is not properly limited they become "runaways" and produce thousands of errored tasks very quickly. So even a relatively small number of runaway ATI cards can give the impression of almost everyone having errors.
Everything is fine now, I have moved back to 11.5 and all seems well.
thanks kashi
Excellent, well done.:thumbsup: