Holdouts lists
A holdout (or undecided machine) is a Turing machine for which it is not known whether the machine halts or not from all-0 input tape. Holdouts are the machines which deciders are unable to decide.
Holdout lists are often shared by contributors:
| BB space | Date | Shared by | Number of holdouts | File |
|---|---|---|---|---|
| BB(6) | June 13th 2024 | @tjligocki, @Shawn Ligocki | 12,091 | File:BB6 holdouts 12091.txt |
| BB(3,3) | June 9th 2024 | @Justin Blanchard | 22 | File:3x3.todo.txt, File:Mugshots small.pdf |
| BB(6) | June 7th 2024 | @mxdys | 12,325 | File:BB6 holdouts 12325.txt |
| BB(2,5) | May 22nd 2024 | @Justin Blanchard | 499 | File:2x5.todo.txt |