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Busy Beaver Problem
Here is the most productive six-state Busy Beaver that we have seen. Started on a blank tape, the machine prints 21 *'s and then halts scanning the first *. It was designed by Chris Nielsen, a student at the University of Washington.

To download the Macintosh version of this file, click here.
If you have a Busy Beaver that beats this one, let us know! Send mail to Logic-comments@csli.stanford.edu.
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