BB(8)
The 8-state, 2-symbol busy beaver problem BB(8) is unsolved. The current champion is 1RB0RA_1LC1LF_1RD0LB_1RA1LE_1RZ0LC_1RG1LD_0RG0RF
(bbch), which is also the BB(7) champion.
The 8-state, 2-symbol busy beaver problem BB(8) is unsolved. The current champion is 1RB0RA_1LC1LF_1RD0LB_1RA1LE_1RZ0LC_1RG1LD_0RG0RF
(bbch), which is also the BB(7) champion.