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About Collatz Conjecture

Collatz is a research project that uses Internet-connected computers to do research in mathematics. You can participate by downloading and running a free program on your computer.

Collatz Conjecture is based in Wood Dale, Illinois. It is a privately managed BOINC project attempting to disprove the Collatz Conjecture. For more information about the Collatz Conjecture, check out the Wikipedia Collatz page. The Collatz Conjecture project makes use of the parity sequence optimization and runs on Linux, Windows, and OS X and can utilize CPUs as well as AMD, nVidia, and Intel graphics cards.
See the results gathered to date

System Requirements

You must have an OpenCL driver installed for your CPU or video card that is recognized by the BOINC client in order to run OpenCL versions of the application. CUDA 4.0 (Linux) or CUDA 5.5 (Windows) is required to run non-OpenCL nVidia applications. AMD CAL/Brook+ is no longer supported due to unfixable bugs in the Brook+ compiler which has been unsupported for at least 5 years. So, AMD GPUs must have OpenCL 1.1 or later capable drivers installed. Both standalone (single core non-OpenCL) CPU and OpenCL (multiple core) CPU applications exist. Set your preferences to omit either, neither, or both. The OS X AMD applications may not work due to bugs in the AMD OpenCL driver for OS X. Multiple requests for fixes to both Apple and AMD have evidently been for naught as the only way to run it without errors is to use no optimization which runs slower than a CPU. Note: If using multiple OpenCL devices from multiple vendors (e.g. nVidia video card and Intel CPU), it is recommended that the driver with the lowest OpenCL support level (1.0, 1.1, 1.2) be installed first. If possible, install OpenCL drivers that all support the same OpenCL version.

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User of the day

User profile Profile gigadisk
I am crunching for CZECH NATIONAL TEAM.


SSL Issues
I'm not sure why yet, but the LetsEncrypt script didn't update the SSL certificate as expected. I ran it manually and it worked. If you are still having problems connecting, please let me know. 12 Oct 2017, 2:38:22 UTC · Comment

Router/Firewall Upgrade
I will be installing a new firewall later this evening around 9pm CDT. If all goes as planned, the site will be inaccessible for only a minute or two. If things really don't go as planned, I'll revert back to the existing router/firewall. 26 Jun 2017, 23:06:08 UTC · Comment

Upcoming Maintenance
The current firewall keeps randomly rebooting and after it restarts, I have to reboot the Comcast modem in order for it to link up. A new firewall should arrive Wednesday and if all goes well, will replace the old one the same day. 13 Mar 2017, 22:45:27 UTC · Comment

Comcast Back Online
Sometime between 10am and 1pm Central Standard Time, the network was down. After rebooting the cable modem at 1pm, it came back online. 5 Mar 2017, 19:06:16 UTC · Comment

Unexpected Power Outage
While we didn't get ice here, we had plenty of rain. Unfortunately, I was gone for the day when the power outage occurred so there was no opportunity to fire up the backup generator. Thankfully, everything came back online although it took 3 reboots before the firewall decided it indeed had a hard drive. If you get a download error, etc. for a workunit, please let me know. When there is a major crash, there are usually a few screwed up workunits where the database and the file system aren't completely in sync. 16 Jan 2017, 23:45:14 UTC · Comment

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