1RB1LE_1LC0RA_0RF0LD_1LE1LA_1RC0LB_---1RC
1RB1LE_1LC0RA_0RF0LD_1LE1LA_1RC0LB_---1RC (bbch) is a really interesting BB(6) holdout TM. Wiki user N1vi highly doubts that it halts, but it creates pseudorandom spaces at the right. N1vi also ran it for ~860 million steps and the result is shown in the image. The machine may be a fractal. Robin Rovenszky (RobinCodes) ran it for ~166 billion steps, and the result is show in the second image.
The TM has otherwise not been analyzed much individually.