News archive

We have found all the smaller path records as well as all starting numbers <2 60 , whose maximum > 2 * 10 16 * starting number (only such numbers are given as candidates) which were found by other persons (mainly Tomas Olivera e Silva and Eric Roosendaal); and thus validate our approach in the opposite direction.

, whose maximum > 2 * 10 * starting number (only such numbers are given as candidates) which were found by other persons (mainly Tomas Olivera e Silva and Eric Roosendaal); and thus validate our approach in the opposite direction. We have found 4 new path records and have been able to prove that all starting numbers <87 * 2 60 (in particular also all <10 20 ) land at 1 and pass into the trivial cycle.

(in particular also all <10 ) land at 1 and pass into the trivial cycle. Thus, we have also shown that a non-trivial cycle must consist of more than 17 billion sequence members

An easy target is to factor all composites under 150 digits

A harder target would be to factor all with SNFS difficulty under 220 digits

Another hard target is to find 500 factors in total.

A very hard target would be to raise the fully factored total to 10,000 --- this requires well over 200 complete factorizations.

id - your yoyo@home user id

theme - 2,3,4,5,6 are different themes.

exit code 195 (0xc3)

app exit status: 0xc00000fd

Vanishing Fermat Quotients (VFQ) happen when, for primes p and q, q2 divides pq-1. Pace Nielsen has many cases are simplified when the VFQs have two large factors, and the simplest way to verify that is to show two large factors. yoyo@home has found four new VFQ factors so far.



OGR: new versions

All Cruncher versions are updated to the latest 509 version of distributed.net client. Read in the forum about the detailed changes.



ECM: ElevenSmooth factor found

Stefan Ver3 found a P37 factor from 215120+1 on Valentine's day. Two small factors were previously known; this reduces the composite cofactor from C2063 to C2026.



OGR-26: End Phase

OGR-26 processed more than 94% and will probably finish this month. Much thanks to all Boinc crunchers. The Boinc Community reached #3 in distributed.net's team stats.



ECM: OddPerfect

The largest work units have been looking for 55 digit factors of OddPerfect's Most Wanted Numbers. This weekend we finished a heavy duty pass through these without success. We had a 30% chance of finding a 55 digit factor; there is a 20% chance that we missed a 55 digit factor. We will be revisiting these numbers often checking for 55 and 60 digit factors. Although it is disappointing to have no Most Wanted Factors, it's exciting to be this thoroughly tested already.

The smaller work units have been looking for 45 digit factors in a batch of small residual composites left over from previously factored numbers. We've had better luck with these, finding several factors already. Behind this batch there are several special projects in the queue.



ECM: new projects

The ECM application is now connected to OddPerfect, ElevenSmooth and XYYXF. The currently running factorizations can be seen on this page. I'm also working on a page with all found factors.



ECM: a regular application

ECM is no test application any more. It's now a regular yoyo@home application. Additionaly the deadline is increased to 5 days for new work units. Now also work units for ElevenSmooth are in the queue.



OGR: new win32 app

Cruncher 2.1 was updated to dnet version 508b which contains a new MMX assembler core. This improves performance by up to 30%. The progress indicator increases now by 14,3%.



OGR: new PS3 app

Cruncher 2.10 runs OGR now also on all SPEs. This should drastically increase the performance of the PS3.



ECM: numbers for OddPerfect

OddPerfect has many tasks that we work on from time to time. The variety of easy and hard tasks keeps things interesting. Yoyo@home's BOINC ecm has already pushed several tasks beyond where William expected to get in all of 2009. In addition we've had the fun of being major contributors to Paul Zimmermann's the Top 10 Factors of 2009.

Read the whole story ...



ECM: test status

The ECM test runs quite good. 64 bit hosts are much faster than 32 bit hosts. Our test found already some factors and we are listed in the 2009 ECM Top 10.

If somebody is able to compile on Mac contact me. In this case we could release also a Mac version. The boinc lib, the wrapper, libgmp and ECM must be compiled and optimized.



OGR-NG: status

OGR-26 made significant progress in the last month. Over 50% is completed. We will probably finish this project in March.



ECM: new subproject

ECM is the next app which is wrapped. Ecm is a program for Elliptic Curve Factorization which is used by a couple of projects to find factors for different kind of numbers.

Some test wus for Linux 32/64 are currently running. To participate on the first tests you must enable test applications in your yoyo@home preferences. Please report problems, suggestions or even success in the forum.



OGR-NG: small application update

Now are all old ogr wus, which contained only 2 ogr, are over. Therefore I update job.xml to now contain 4 tasks. The progress indicator increases now in 4 steps. To get closer to the PS3 needs I also increased the number of ogr contained in one boinc wu to 7.



Badges

Since round about one week I'm collecting credits per user and sub project. You will be rewarded with a badge if you reach a certain level of credits per sub project. The following levels exists currently:

Bronze - 10.000 credits

Silver - 100.000 credits

Gold - 500.000 credits

Master - 1.000.000 credits.

Thanks to Rebirther for the work on the icons.



Project Changes

In preparation to a PS3 version which uses also SPE I increased the amount of ogr which are in one Boinc wu. There are now 4 ogr in one Boinc wu instead of 2.

I also capture credits and number of wus per subproject for teams and user. If somebody want's to generate some nice statistics or signature pictures out if it these stats are exported here.



OGR-NG: official relased

The OGR cruncher is now official released. I made also an update of the windows client to the latest version (507b) which was released by distributed.net.



OGR-NG: Solaris Sparc64

I released also a Sparc64 beta client for OGR-NG. Please test and report in the forum if it runs.



evolution@home

I created now all new evolution@home simulations. On the server status page you can now see how many workunits are available to finish the first basic goal of the new simulation series.



muon: some statistic

We are providing a continous flow of results to Stephen Brooks Muon1 project. In total 2.77% are provided by the Boinc system. In the current running Linac900Removable6 simulation the Boinc system contributed 21.6%.



evolution@home: new simulations

A new set of computing tasks is published today in order to further investigate how two different types of slightly harmful DNA changes interact with each other's evolutionary behaviour in a population. The new workunits are named 'evo_A....'. Runtime is up to 2 days (on our 500MHz Pentium reference system).



OGR-NG: new beta apps

I added beta applications for OGR-NG (ogr next generation). You must enable test applications to get them.

The effective search rate is actually more efficient as these new applications are using an improved algorithm. The new algorithm is named FLEGE (Feiri-Levet Enhanced GARSP Engine). In technical terms, the number of elements in the 'choose lookup table' has been increased from 48K to 2M elements. This optimization will significantly reduce the number of nodes that we have to search through, sometimes a node improvement of ten-fold or more.

Distributed.net estimates that OGR-26 will take much less time to complete than OGR-25 and will probably be more similar to OGR-24, in terms of computational effort. Beyond that, distributed.net is looking forward to OGR-27 and OGR-28 because the current solutions to at least one of the two is very likely not optimal. OGR-26 is on the way and must be done first since higher-order rulers depend on the proven optimality of previous ones.



OGR-25: Successfully Finished

The 8-year-old OGR-25 distributed computing project has just proven conclusively that the predicted shortest 25-mark Golomb ruler is optimal. 'The total length of the ruler is 480, with marks at positions: 0 12 29 39 72 91 146 157 160 161 166 191 207 214 258 290 316 354 372 394 396 431 459 467 480. (This ruler may alternatively be expressed in terms of the distance between those positions, which is how dnetc displays them: 12-17-10-33-19-...).' 124,387 people participated in the project and two people found the shortest ruler, one on October 10, 2007 and the other on March 24, 2008.

Yoyo@home user participated on this contest for 446 days, calculated 710,813,759 GNodes and reached together #6 in the team ranking.

Big thanks to all participiants.

yoyo



What next?

In some days ogr will be over. I would enjoy to start the discussion which project should be included next. If you also have contact to the authors of some projects, leave me a message. And of course if somebody is interested to help in the integration, contact me.

I also have some projects on my radar, but will not start the discussion with these ;). So discussion is reopend, give your suggestions in our forum.



OGR: 0.15% left

Only 0.15% ogr left and we are going to finish the project. Therfore I encourage all users to use only small buffers. Otherwise the OGR would already have been crunched by somebody else and the result does not help the project to finish.

Some weeks ago I changed already some settings for OGR Boinc WUs:

deadline is now only 7 days, before it was 14 days

there are no resends anymore

only 1000 unsent WUs, before it was 5000

only 8 ogr in one Boinc WU, before it was 9

decrease of ogr in my dnet proxy from 50.000 to 20.000

starts at 1. September 0:00 UTC and ends at 15. September 0:00 UTC

Last night we analysed the problem and decided that we need more memory and a separation of yoyo@home and the rest of the rechenkraft.net page. Thanks to the support which I got in chat and to the donations, we now ordered a new server for yoyo@home.

Our new server is installed and got the yoyo@home backup but is currently not yet online. I think that workunits which reached the server will get credits, but it seems that there are a couple of WUs which were not properly uploaded. For these no credits can be granted. We hope to be online very soon.



Linux 32 bit 1.09

Version 1.09 of cruncher for Linux 32 bit contains now the newest distributed.net client version 2.9015-504.



new evolution@home wus

I created some new evolution@home workunits, which are now twice as long as before.



new PS3 Cruncher

A memory corruption problem was recently detected in the PS3 version of the cruncher. Read more about it in our forum and report problems or even that there are no problems.



new evo wus

I will create new workunits for evolution@home. The new workunits runs longer than before. Because of missing checkpoints I will grant 30% more credits for all credits which are higher than 100.



1.04 of evolution@home

Version 1.04 will no more crash if the work unit restarts. But it starts from the very beginning, it does not resume the work unit.



Evolution@home now productive

The evolution@home application is now productive. By default you will get now workunits from both applications. You can change these settings in your preferences.

yoyo



Fixed credits for evo

Fixed credits for evolution@home workunits are now in place. Report problems or questions in our forum.



Best wishes

I wish you a merry christmas and a happy new year. Thank you for supporting yoyo@home and running to rank #25 in the distributed.net team stats.



yoyo



Top 30 reached

The race between L'Alliance Francophone and SETI.Germany pushed yoyo@home in the top 30 of the overall distributed.net team stats. Thanks fellow crunchers for this christmas gift.



evolution@home update

Short update information for evolution@home: In the last days I automated the sending of results to Laurence, the author of evolutio@home. I sent round about 100MB of compressed data. He was on a conference and busy with preparations for it. But now he reviews and imports the results. As next step I will work on fixed credits to aoid double computing. I clarified the concept and have now an idea how it could be calculated. If both things are working I will switch from beta to productive.



7 times OGR output

Since some days a race between the #1 and #2 team is ongoing. Therefore the OGR output povided to distributed.net is now 7 times more than before. I keep a very close eye to the server to ensure everytime enough work units.



Beta version of evolution@home for Mac

I released a beta version of evolution@home for Mac. Give feedback in the forum.



Top 50 reached

yoyo@home reached the top 50 in the overall distributed.net team stats.



Server status page

I added information on the server status page to see for which application work units are available.



1.02 beta of evolution@home

Version 1.02 runs additional to Windows XP also on Windows 2000 and Vista. It has also a progress indicator. But it is hard to estimate the time to complete a workunit and also the progress. So it may happen that the workunit finishes already at 50%. But anyway better than no progress indicator.



First beta of evolution@home

The first beta of evolution@home is running and it runs better than expected. The results contains already real usefull simulations which will be send back to the author.

Thanks to rebirther for the logo update.

BTW: If somebody wants to develop a nice screensaver send me a mail.



New versions for Mac and Linux

To get rid of the sometimes appearing endless loop at 87% of the wu I created new versions for Intel and PPC Mac and for 32- and 64 bit Linux. This problem happened for round about 10% of the work units on Mac and Linux.



Backup

I implemented a database backup and some cleanup of all the generated log and statistics.

The server runs smoothly without any manual intervention. More than 100 days OGR are crunched for distributed.net. In total individual and team stats we are in the top 100. On daily basis we are in the top 5.

I started now phase III, wrapping the next project.



Statistics

After two month providing OGR back to distributed.net the yoyo@home Boinc wrapper team is on the overall rank 157 of all teams in distributed.net statistic.

OGR has now completed more than 72% of its search space, predicted end is mid of 2008.



64 bit Linux version update

Some volunteers reported problems on 64 bit Ubuntu. I hope version 1.08 now fixes this issue. This version is now a native 64 bit version.



Free BSD version

Added a Free BSD version for Intel.



Additional clients

Thanks to Dotsch clients for PS3 and Sparc Solaris could be added. Please test and report success and problems in our forum. A Boinc 5.11.0 client for Solaris can be downloaded here.



OGR project status

OGR has now completed more than 70% of its search space. Some predictions predict the end for the mid of 2008.



New validator

A new validator is in operation which grants credits based on calculated GNodes. Quorum is now set to 1 and credits are granted immediately.



Statistics

After one month providing OGR back to distributed.net the yoyo@home Boinc wrapper team is on the overall rank 651 of all teams in distributed.net statistic.



Version 1.08

Suspend / resume did not work properly on Windows. This version solves the problem. If there a problems with this version report it in our forum.



Parameter for WUs changed

I increased the estimated fpops for a workunit 20 times. This should avoid to many downloads which can not fit the deadline. For new workunits the deadline is increased to 7 days.



Version 1.07

Suspend, resume, exit should now works properly in version 1.07. Thanx to Codemann and scsimodo. Please report problems in our forum.



Version 1.06

Version 1.06 contains checkpoints and a progress indicator. Progress bar will be increased every 1/8 of the WU. Please report problems in the forum.



64 bit version for Linux

I added a 64 bit version for Linux. Please report problems in this thread.



More clients?

If you are interested in clients for different platforms send me a mail (yoyo at mailueberfall dot de) or post it in our forum.



Version 1.05 Intel Mac / Linux

Linux version is now static linked and works also on systems with older gcc.

Intel Mac version should now also work. The execute flag on cruncher was missing.



Profile picture

The problem storing the profile picture is now solved.



Here we are

Here we are on a new server with fixed IP. Account creation is open.



Windows version

Big thanks to Codemann who compiled the Windows wrapper and did a great support. The windows version is now also ready for testing and I released new OGR work units to celebrate it. The project now enters Beta state.

If you are interested in applications for other platforms write a mail to yoyo at mailueberfall dot de or use the forum.

If you have problems with the project reset it, it should work afterwards.



Mac WUs

Big thanks to scsimodo and frost who compiled the Mac wrapper and did a great test. The Mac version is now ready for testing and I released also 100 work units to celebrate it. There is also progress developing the Windows version.

BTW: Account creation is open.



Linux WUs

Created some work for Linux cruncher to test the work generator, validator and assimilator. The legacy application which is now integrated is the distributed.net client which runs OGR.



Legacy Application

Integration of the legacy application started. I distributed some work for Linux. Some more will follow soon.



Fixed Credits

Now fixed credits are granted. I also increased the runtime to 30 minutes. The server was updated to the latest version. Please report problems in the forum.

A big thanks to scsimodo providing the application for Mac.



Logo

The project now has a logo, thanks to Rebirther.



Fixed credits

Will test fixed credits this weekend. How many credits should be given for a WU? Send your suggestions to yoyo at mailueberfall.de or in the forum.



Account creation

Account creation is now opened for the next days.



Account creation

Account creation will be opened in the next days.



Windows Applikation

Dank tutta55 vom Team Boinc.be gibt es jetzt auch eine Applikation für Windows.



Änderungen an WU Verteilung

Es gibt jetzt nur noch 20 WU pro Tag und ein User sollte jetzt nicht mehr die gleiche WU 2 Mal erhalten.



update

Der Server läuft erstmal stabil. Ich lass ihn mal laufen. Forum und Wiki sind auch vorbereitet und verlinkt. Herzlich Willkommen auch an die Yahoo und Google Bots, die sich inzwischen jede WU angesehen haben.



yoyo@home started

yoyo@home aufgesetzt. Workunits dauern z.Z. ca. 10 Minuten. Wer unter Linux rechnet und etwas testen will schreibt mir eine email. Ich richte dann einen Account ein. Es wird Uppercase gerechnet. Die Workgeneratoren, Feeder und Assimilatoren laufen. Der Server wird nur gelegentlich mal Online sein, ich hoffe so immer von 20:00 - 22:00 oder auch öfter, mal sehen.

Nächste Schritte:

