LHC@home: Test4Theory

In conjunction with [url=http://www.earthday.org/2012]Earth Day 2012[/url] World Community Grid is pleased to announce the launch of the [url=http://www.worldcommunitygrid.org/about_us/viewNewsArticle.do?articleId=198]Computing for Sustainable Water[/url] project! This project is run by the researchers at The University of Virginia, USA. For more information on this project, please ...

Because of the recent discovery and exhaustion of the search range, current iteration of Sophie Germain project is being finished. No new work will be inserted, and only some resends for unfinished work will be issued. There are plans to restart Sophie Germain search in the future: we are evaluating best approach to the problem at the moment. If you have opted only into Sophie Germain project, we suggest revising your project preferences and selecting other projects so that you keep receiving work.

On 19 Apr 2012, 21:12:27 UTC, PrimeGrid’s Generalized Fermat Prime Search, through PRPNet, found the mega prime: 773620^262144+1 The prime is 1,543,643 digits long and enters Chris Caldwell's “The Largest Known Primes Database” ranked 2nd for Generalized Fermat primes and 22nd overall. The discovery was made by Senji Yamashita of Japan using an NVIDIA GeForce GTX 580 in an Intel Core i7-970 @ 3.20GHz system with 6GB RAM, running Windows 7 Professional x64. This GPU took about 47 minutes to probable prime (PRP) test with GenefCUDA. Senji is a member of the PrimeSearchTeam. For more details, please see the official announcement.

We had to cancel these WUs on-the-fly. fragxa3 were 10 times longer by mistake and would not have finished in most computers. On Monday we will look into compensating who was affected by this. Sorry for the inconvenience. gdf

IBM World Community Grid has launched a new application, Computing for Sustainable Water, enabling researchers at the University of Virginia to study the effects of human activity on large watersheds.

Next week six new graduate students will start their projects on Leiden Classical. Furthermore, a paper on the results of the phonon model (for which we used this BOINC project) has been submitted to the Journal of Chemical Physics. Hopefully it will be accepted.

We are submitting a new batch of WUs (~1000) of our beloved trypsin and benzamidine system for a beautiful experiment in collaboration with a crystallographer. It seems that these crystallographers and us may have got to similar conclusions on how trypsin and benzamidine like to interact. The nice thing is that we'd have got to the conclusions from VERY different approaches. They make crystals of trypsin/benzamidine and take pictures of their structures using a synchrotron and we make MD simulations of already solved structures and take many snapshots of what happened. And then we compare them. If experimentalists (protein crystallographers in this case) are able to reproduce what we obtained from computer simulations or viceversa, it would be a beautiful (and necessary) validation of our methods. Let's hope that all goes well. Cheers!

On 9 April 2012 6:31:14 UTC, PrimeGrid’s Sophie Germain Prime Search found a World Record Sophie Germain prime: 18543637900515*2^666667-1 (2p+1: 18543637900515*2^666668-1) The prime is 200,701 digits long, eclipsing the previous record of 79,911 digits. It enters Chris Caldwell's “The Largest Known Primes Database” ranked 1st for Sophie Germain primes. The discovery was made by Philipp Bliedung (pabliedung) of the United States using an Intel Core i7 950 @ 3.07GHz with 12 GB RAM running Linux. Philipp is a member of the USA team. The prime was verified on 9 April 2012 9:36:15 UTC, by Lee Blyth (IshtarIS) of Australia using an Intel Core i7 2600k @ 3.40GHz with 8 GB RAM running Windows 7 Ultimate. Lee is a member of the Ishtar team. For more details, please see the official announcement.

We updated the featured concept to Dark Matter, with a cool image of the bullet cluster. At the bottom of the featured concept on the home page there is a link that will take you to a thread on the message board where you can comment and ask questions. Enjoy!

We had some technical issues in the last few hours. Everything is solved by now without any data loss. Thank you for understanding.

March was a special month for the Extended Sierpinski Problem (ESP) on PrimeGrid's PRPnet. After two years of crunching with no prime finds, two more k's were eliminated: The first discovery was made by Timothy D. Winslow (Pooh Bear 27) of the United States on Wednesday 14th of March 2012. 123287*2^2538167+1 is prime and at 764070 digits entered Chris Caldwell's Top 5000 list as the 78th largest prime. The second discovery was made by Rodger Ewing (Pilgrim) of the United States on Tuesday 27th of March 2012. 147559*2^2562218+1 is prime and at 771310 digits entered Chris Caldwell's Top 5000 list as the 77th largest prime. 15 k's now remain. Congratulations to both Rodger and Tim! The next ESP find will very likely also be a Mega Prime! For more information about the Extended Sierpinski Problem, see this forum post.

A new NBody run has been posted. We are trying to determine the initial dark matter distribution of some test data. There have been some improvements to our model which should hopefully result in faster convergence times. The run is titled nbody_100K_Plum_EMD. All previous Nbody runs have been taken down.

After installation of 4TB of disk space and a re-organization of the file system, and a few updates and bug fixes, such as updating the data base to fix an annoying and persistent problem with setting user preferences, we are back in production. Thank you for your patience and keep crunching!

The next version of BOINC is now ready for public use. Check the release notes and version history for details.

Journal post from David BakerI've described in the past our work using Rosetta and Rosetta@Home to create new enzyme catalysts. In Nature Chemical Biology last month we describe the design of an enzyme which destroys organophosphate nerve agents and pesticides. These compounds kill by blocking key enzymes, and our designed enzyme eliminates this toxicity. This illustrates how Rosetta@Home enzyme design work can help to solve current problems, including man-made problems.

The author I mentioned in the previous news item would also like to interview someone outside of the US, hopefully in an interesting location. Again, contact me if you fit the bill.

Rosetta@Home software updated to version 3.26. This update includes several enhancements for symmetry in the hybrid protocol for comparative modeling. If you encounter any issues, please let us know here

After 1100 days the OGR-27 project completed 50% of the work. According to the current rate the project will finish in March 2015.

On special request of Paul Zimmermann I put 200 demanding workunits into the queue. They are named ecm_as_Bernoulli_B200_P67. I expect, that they require 1.8GB RAM and expect a runtime of 20h. If these 200 workunits run well I will distribute further 13000.

Forum under maintenance. Any updates maybe lost