This 3-state busy beaver halts after 14 steps and writes six 1s on the tape. You can’t do more without more states. The coloured squares show the head position and the state of the processor.
More from Chalkdust
Review: Power in numbers — the rebel women of mathematics
Celebrate International Women's day by reading about rebel women in mathematics!
Black Mathematician Month 2018
We look back at last year's Black Mathematician Month, and give a preview of what to expect this October.
Closing the Gap
A review of Vicky Neale's new book about the quest to understand prime numbers.
Mike Jordan on machine learning
Undoubtedly the most influential voice on this hottest of hot topics.
Closing the first Black Mathematician Month
Reflecting on what we've learnt over the past few weeks.
In conversation with Vernon Morris
The co-author of a recent paper on diversity in professional STEM societies talks about access to science.