Home Active Projects The 3x + 1 Class Record Search

Please note: This site has officially become a museum of volunteer computing as opposed to an active site.

When the site was started, there was a need for better volunteer computing information, but I am happy to say that there is enough information available now that this website's mission is no longer necessary. Please see sites listed on the links page for more current information.

The 3x + 1 Class Record Search PDF Print E-mail
Active Projects - Math & Strategy Games

The 3x+1 class record search is using the Collatz conjecture (see below) to analyze very large numbers, which is similar to what the 3x+1@home project is doing. One large difference between the two efforts is that this project requires users to e-mail their results to the administrator instead of the hands-off approach used by the boinc-based 3x+1@home project. The search's homepage has a lot of useful information pertaining to the project.

Description of the 3x+1 conjecture (a.k.a. the Collatz conjecture)

  • Start with any positive integer.
    • If the number is even, divide by two.
    • If the number is odd, multiply it by three then add 1.
  • Repeat these steps with the resultant number until you reach one.
  • Sample pattern: 7, 22, 11, 34, 17, 52, 26, 13, 40, 20, 10, 5, 16, 8, 4, 2, 1
 
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