3x+1@home

About 3x+1@home

3x+1@home is a distributed non-profit project trying to find high 3x+1 conjecture stopping times.
The 3x+1 conjecture is also known as Collatz conjecture, more information can be obtained here and here.
You can participate by downloading and running a free program on your computer.

Join 3x+1@home

Read our rules and policies
This project uses BOINC. If you're already running BOINC, select Attach to Project. If not, download BOINC.
When prompted, enter
http://allprojectstats.com/collatz/
If you're running a command-line or pre-5.0 version of BOINC, create an account first.
If you have any problems, get help here.

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Community

User of the day

John Galt 007
Hi, my name is Buddy. I love the outdoors and digging in the backyard.

News

Nov 12, 2008 Project will soon close down
Due to a lack of time and resources, we have to close down 3x+1@home soon. On Friday, 14th November, we'll stop generating new work units but results can still be returned for a long time. Of course the project page will stay on-line for everyone to view or download (available soon) the project results. Thanks to everyone who has participated in this project!

Sep 29, 2008 2359
Another candidate for later deep-testing is found: 2,361,293,168,535,921,170,175 stopping time 2359. Congratulations, [B^S] Ralfy!

Aug 12, 2008 2346
Congratulations Neil! Workunit 237721 had a stopping time of 2346, integer is: 2,361,248,585,948,675,503,343

Aug 6, 2008 High stopping time found
Again, the project as found a higher stopping time: 2284, the integer is 2,361,235,441,021,745,907,775. Congratulations to "[AF>EDLS] Pitheque"!

Jul 16, 2008 Optimized application Linux 64 bit
The new optimized application for Linux 64bit is ready. It is about 10% faster.

...more

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