User:Polygon/Collection of BB Champions

A collection of Busy Beaver Champions including Champions for BB-Adjacent functions. Note that for all functions with the input format f(n,m), n denotes the number of states and m denotes the number of symbols of the relevant Busy Beaver domain. Note that for functions with this input format f(n) = f(n,2).

State-and-Symbol-Limited Busy Beaver functions

Busy Beaver functions where the programs size is limited by the amount of states and symbols.

Original Busy Beaver Functions

Maximum Shifts Function (S(n,m), also commonly called BB(n,m))

Maximum amount of steps a Turing machine with n states and m symbols can run for before halting when started on the blank tape.

2 Symbols:	Runtime	Champions	Reference
BB(1)	1	1RZ--- (bbch)
BB(2)	6	1RB1LB_1LA1RZ (bbch) 1RB0LB_1LA1RZ (bbch) 1RB1RZ_1LB1LA (bbch) 1RB1RZ_0LB1LA (bbch) 0RB1RZ_1LA1RB (bbch)
BB(3)	21	1RB1RZ_1LB0RC_1LC1LA (bbch)
BB(4)	107	1RB1LB_1LA0LC_1RZ1LD_1RD0RA (bbch)
BB(5)	47,176,870	1RB1LC_1RC1RB_1RD0LE_1LA1LD_1RZ0LA (bbch)
BB(6)	> 10 ↑↑ 10 ↑↑ 10 ↑↑ 8.10237	1RB1RA_1RC1RZ_1LD0RF_1RA0LE_0LD1RC_1RA0RE (bbch)
BB(7)	$>3{\uparrow }^{20}3>f_{\omega }(20)$	1RB0RG_1RC1RB_0RD1RZ_0LE0LD_0LF1LE_1RA1LF_1LC0RB (bbch)
BB(8)	$>f_{\omega }^3(12)$	1RB0RA_1LC1LF_1RD0LB_1RA1LE_1LH0LC_1RG1LD_0RG0RF_1RG1RZ (bbch)
BB(9)	$>f_{\omega }^7(12)$	1RB0RA_1LC1LF_1RD0LB_1RA1LE_0LH0LC_1RG1LD_0RG0RF_0LI1RZ_1RI1RC (bbch)
BB(10)	$>f_{\omega +1}(2{\uparrow }^{36}3)>g_{64}$	1RB0RA_1LC1LF_1RD0LB_1RA1LE_1LI0LC_0RG1LD_1RH1LG_1LC0RG_0LJ0LI_1RZ0LC (bbch)
BB(11)	$>f_{\omega +1}(f_{\omega }^2(5))$	1RG0LH_1RK1RC_0LD1LA_0RE1LD_0LI1RF_1RZ0RG_1RB1RG_1LA1LH_0LK0LJ_1LH1LI_1LJ1RE (bbch)
BB(12)	$>f_{\omega +2}(f_{\omega +1}^2(3))$	1RB1RA_1RI1RC_0LD1LG_0RE1LD_1LK1RF_1RG0RA_1RA0LH_1LG1LH_1RE0LJ_1LH1LI_1RZ0LL_0LH1LK (bbch)
BB(13)	$>f_{\omega +2}^6(f_{\omega +1}^2(3))$	1RB1RA_1RI1RC_0LD1LG_0RE1LD_1LK1RF_1RM0RA_1RA0LH_1LG1LH_1RE0LJ_1LH1LI_0LL0LL_0LH1LK_1RZ0LH (bbch)
BB(14)	$>f_{\omega +3}(30)$	1RB1RA_1RI1RC_0LD1LG_0RE1LD_0RN1RF_1RM0RA_1RA0LH_1LG1LH_1RE0LJ_1LH1LI_0LL0LL_0LH1LK_0LK0LH_1LM1RZ (bbch)
BB(15)	$>f_{\omega \times 2}(13)$	1LH0LG_0LI1RC_0LD1LA_0RE1LD_0RH1RL_1RB1RF_1LA1LG_1RF0RO_1LJ1LI_0LK1LI_1RL1RE_0RL0RF_0LA0RN_0LA1RO_1RZ1RM (bbch)
BB(16)	$>f_{\omega \times 2}(f_{\omega }(14))$	1LG1LA_0LI1RC_0LD1LG_0RE1LD_0RM1RL_1RB1RF_1LH0LA_1RF0RN_1LJ1LI_0LK1LI_1RL1RE_0RL0RF_0LG0RN_0RP1RO_1RZ1RM_1LB1LI (bbch)
BB(17)
BB(18)	$>f_{\omega \times 2}(f_{\omega }^9(35))$	0LB1LF_0RC1LB_0RD1RM_1LE0RN_1LF1LE_1LG0LE_1RH1RP_1RI1RH_0LJ1RA_1LK1LJ_0LL1LJ_1RM1RC_0RM0RH_1LE1RO_1RZ1RD_0LF0RQ_0LH1RR_0LF1RP (bbch)
BB(19)
BB(20)	$>f_{\omega \times 2}(f_{\omega +2}^2(f_{10}(2)))$	1LH0LG_0LI1RC_0LD1LA_0RE1LD_1RQ1RL_1RB1RF_1LA1LG_1RF1RM_1LJ1LI_0LK1LI_1RL1RE_0RL0RF_0LN1RM_0RF0LO_0RF1LP_0RF1LN_1LR1RQ_1RZ1LS_0LF1LT_0LF0LR (bbch)
BB(21)	$>f_{{\omega }^2}^3(4\uparrow \uparrow 341)$	0LI0LF_0RJ1RG_0RD1LC_1RH1RE_1LO0RH_1LA1LF_0LC1LA_1RB1RH_1RD0LF_1LP0RK_0LM1LL_0LL1LM_1LE1LN_0RQ0LM_0RP1LO_1LR0RH_1LF1RQ_1RZ0LS_1LH0LT_1LH1LU_0LE1LR (bbch)
BB(25)	$>f_{{\omega }^2}^5(4\uparrow \uparrow 341)$	0LI0LF_0RJ1RG_0RD1LC_1RH1RE_1LO0RH_1LA1LF_0LC1LA_1RB1RH_1RD0LF_1LP0RK_0LM1LL_0LL1LM_1LE1LN_0RQ0LM_0RP1LO_1LR0RH_1LF1RQ_1RZ0LS_1LH0LT_1LH1LU_0LE1LV_0LH0LW_1LH0LX_1LH1LY_0LE1LR (bbch)
BB(29)	$>f_{{\omega }^{\omega }}(3)$	[1]
BB(31)	$>f_{\omega \uparrow \uparrow 4}(3)$	[2]
BB(33)	$>f_{\omega \uparrow \uparrow 6}(3)$	[3]
BB(48)	$>f_{{\epsilon }_0}(f_{\omega +1}(f_{{\omega }^{{\epsilon }_0+1}}(f_{{\omega }^2}(f_{{\omega }^{{\omega }^{{\epsilon }_0+1}}}(f_{{\omega }^3}(f_{{\epsilon }_1}(3)))))))>f_{{\epsilon }_1}(3)$	[4]
BB(150)	$>f_{lim(BMS)}(10\uparrow \uparrow 15)$	too large to show
BB(1015)	$>D^5(99)$ = Loader's Number

3 Symbols:	Runtime	Champions	Reference
BB(1,3)	1	1RZ------ (bbch)
BB(2,3)	38	1RB2LB1RZ_2LA2RB1LB (bbch)
BB(3,3)	$\ge 119112334170342541>10^{17}$	0RB2LA1RA_1LA2RB1RC_1RZ1LB1LC (bbch)
BB(4,3)	$>2\uparrow \uparrow \uparrow 2\uparrow \uparrow \uparrow 2\uparrow \uparrow \uparrow (7.92\times 10^{28})$	1RB1RD1LC_2LB1RB1LC_1RZ1LA1LD_0RB2RA2RD (bbch)
BB(6,3)	$>f_{\omega }^2(10\uparrow \uparrow \uparrow 6)$	1LE2LD2LC_2RB1RB1RA_2RB1LC0LC_1RB1LD2LD_2RD2LE2LF_1RZ---1LE (bbch)
BB(8,3)	$>f_{\omega +1}^4(f_{\omega }^3(14))>g_{64}$	2LH1LE2RA_0LE2LE2RB_1RF1RC2RB_0RC0LD0RH_1RC2LE1LG_0LA0LD1RZ_1LD2RA2LG_2RD1LF1LG (bbch)
BB(9,3)	$>f_{\omega +2}^3(f_{\omega +1}^2(f_{\omega }(14)))$	2LI1LE2RA_0LE2LE2RB_1RF1RC2RB_0RC0LD2RA_1RC2LE1LG_0LA0LD1RH_1LD2RA2LG_1RZ2LA2LI_1RD1LI2LH (bbch)
BB(10,3)	$>f_{\omega \times 2}(11)$	1LD2RG2LA_2LE2LH2RB_1LI1RC2RB_0RC1RD0LG_0LF1LE1LE_1RG1RZ---_0RC1LH2RG_1RC2LH1LA_1RJ2LI2LB_0RF1LA0RI (bbch)
BB(11,3)	$>f_{\omega \times 2}(46)$	1LD2RG2LA_2LE2LH2RB_1LI1RC2RB_0RC1RD0LG_0LF1LE1LE_1RG1RZ---_0RC1LH2RG_1RC2LH1LA_1RJ2LI2LB_0RF2LK0RI_2RG2RK1LK (bbch)
BB(12,3)	$>f_{\omega \times 2}(f_{\omega +2}^2(4))$	1LD2RG2LA_2LE2LH2RB_1RK1RC2RB_0RC1RD0LG_0LF1LE1LE_1RG1RI0RL_0RC1LH2RG_1RC2LH1LA_0RI2RI2RJ_0LJ1RZ1LA_1LK0LL2LA_2LL0LE2LB (bbch)
BB(13,3)	$>f_{\omega \times 2}^3(f_{\omega +1}(f_{\omega }^2(5)))$	1LD2RG2LA_2LE2LH2RB_1RK1RC2RB_0RC1RD0LG_0LF1LE1LE_1RG1RI0LM_0RC1LH2RG_1RC2LH1LA_0RI2RI2RJ_0LJ1RZ1LA_1LK0LL2LB_2RG2RE2RL_1LL0RL0LK (bbch)
BB(36,3)	$>f_{{\epsilon }_0}(7)$
BB(37,3)	$>f_{{\epsilon }_0}(373676378)$

4 Symbols:	Runtime	Champions	Reference
BB(1,4)	1	1RZ--------- (bbch)
BB(2,4)	3,932,964	1RB2LA1RA1RA_1LB1LA3RB1RZ (bbch)
BB(3,4)	$>(2{\uparrow }^{15}5)+14$	1RB3LB1RZ2RA_2LC3RB1LC2RA_3RB1LB3LC2RC (bbch)
BB(4,4)	$>2{\uparrow }^{509}3>f_{\omega }(508)$	0LB3LB1RZ2RA_1LD3RB1LC2RA_3RB1LB3LC2RC_0RD2RC2LB0RA (bbch)
BB(5,4)	$>f_{\omega }^2(10{\uparrow }^{4}10\uparrow \uparrow 65533)$	1LD2RA3RB1LC_1LD2LA3RB---_2RA1LA3RC2LC_2RA---2LD2LE_------1RZ1LD (bbch)
BB(6,4)	$>f_{\omega +1}(10\uparrow \uparrow 65533)>g_{64}$	1LF2RA3RB---_3RD2LB3RB1LC_2RA1LB3RC2LC_1LD2RE0LA1LD_1RZ0LE1LF---_2RA---2LF2LF (bbch)
BB(7,4)	$>f_{\omega +3}(21)$	3RD1LE2RA1LF_0LE2LE2RB2RD_1RF1RC2RB0LB_0RC0LD3RC2RA_1RC2LE1LG2RF_0LA0LD3LG1RZ_1LD2RA2LG0RB (bbch)
BB(8,4)	$>f_{\omega +8}^2(4)$	1LD2RG2LA---_2LE2LH2RB1LF_2LA1RC2RB---_0RC1RD0LG1RH_0LF1LE1LE3LB_1RG1RZ3RD3LF_0RC1LH2RG0LC_1RC2LH1LA2LB (bbch)
BB(9,4)
BB(11,4)	$>f_{\omega \times 2}(2{\uparrow }^{11}6)$	1RK3LB1RZ2RA_0LG1LE1LD2RA_3RB1LB3LC2RC_3RE0LI3LC2RC_1RJ3RE3LH2LF_3RF2RF2LE1LF_3LC3LH2LJ2RG_0LE3RH1LI2RG_3RH1LH3LI2RI_0LB0LJ3LJ3RK_2LC0LD2RA3RK (bbch)
BB(12,4)	$>f_{\omega \times 2}^2(2{\uparrow }^{6}3)$	1LH---1LD2RB_2LL3LA1RZ2RB_3RA1LA3LC2RC_3RE---3LC2RC_2LI3RE3LH2LF_3RF2RF2LE1LF_1LL3LH2LJ2RG_2LC3RH1LI2RG_3RH1LH3LI2RI_------3LJ3RK_------2RB3RK_3RB---1LL3LL (bbch)
BB(31,4)	$>f_{{\epsilon }_0}(373676378)$

5 Symbols:	Runtime	Champions	Reference
BB(1,5)	1	1RZ------------ (bbch)
BB(2,5)	$>10^{10^{10^{3314360}}}$	1RB3LA4RB0RB2LA_1LB2LA3LA1RA1RZ (bbch)
BB(3,5)	$>f_{\omega }(2{\uparrow }^{15}5)>f_{\omega }^2(15)$	1RB3LB4LC2RA4LB_2LC3RB1LC2RA1RZ_3RB1LB3LC2RC4LC (bbch)
BB(4,5)	$>f_{\omega +1}(27041)>g_{64}$	1RB3LB4LC2RA4LB_2LC3RB1LC2RA4RD_3RB1LB3LC2RC4LC_2RC2RD1RZ4RB1LC (bbch)
BB(5,5)	$>f_{\omega +1}(f_{\omega }^4(6))$	1LB3LB4LC2RA4LB_3LE3RB1LC2RA4RD_3RB1LB3LC2RC4LC_1RZ------4LD4LE_3RB------4LE3LC (bbch)
BB(6,5)	$>f_{\omega +3}(11)$	2LE3LB4LC2RA4LB_4RA3RB1LC2RA4RD_3RB1LB3LC2RC4LC_1RZ3LF1LA4LD4LE_3RB---0RD4LE3LC_4LC------3LF3LF (bbch)
BB(7,5)	$>f_{\omega +3}^2(10)$	2LE3LB4LC2RA4LB_4RA3RB1LC2RA4RD_3RB1LB3LC2RC4LC_1RZ3LF1LG4LD4LE_3RB---1LE4LE3LC_4LC------3LF3LF_3LF------1LG1LG (bbch)
BB(8,5)	$>f_{\omega \times 2+1}(93)$	2RG3LB4LC2RA4LB_1RZ---1LD2RA4LD_3RB1LB3LC2RC4LC_3RE---3LC2RC3LC_---3RE4LE4LH4RB_4LE3LG3LB2RF4LG_2LH3RG1LH2RF2RA_3RG1LG3LH2RH4LH (bbch)
BB(19,5)	$>f_{{\epsilon }_0}(1.7\cdot 10^{352})$	1RB2LA1RA2LB2LA_0LA2RB3RB4RA1LQ_1RZ1RC2LD------_0LK3RD2RD2RD4RD_------0RH1LS0RF_1LG1RF2RF---4RF_4LE1LG2LG---4LG_0LI1RH2RH---4RH_0RK0LJ------4RK_2LE1LJ2LJ---4LJ_4RP---0LE---0LK_2RQ---2LL---4LL_2LN---2RM3RM4RM_4RQ2RQ2LN3LN4LN_4LN---2RO3RO4RO_3LL1LP2LP1LQ4LP_1RC3RR1RM3LP0RO_3LL1RR2RR0RR4RR_1RC1LS2LS1LS4LS (bbch)
BB(94,5)	$>f_{{\psi }_0({\mathrm{\Omega }}_2)}(1.7\cdot 10^{352})$

6 Symbols:	Runtime	Champions	Reference
BB(1,6)	1	1RZ--------------- (bbch)
BB(2,6)	$>10\uparrow \uparrow 10\uparrow \uparrow 10^{10^{115}}$	1RB3RB5RA1LB5LA2LB_2LA2RA4RB1RZ3LB2LA (bbch)
BB(3,6)	$>f_{\omega }^3(15)$	1RB3LB4LC2RA4LB5LB_2LC3RB1LC2RA5LC1RZ_3RB1LB3LC2RC4LC5LC (bbch)
BB(4,6)	$>f_{\omega +2}(29)$	5LD3LB5LC2RA4LB4LC_1RZ3RB1LC2RA3RD0LA_3RB1LB3LC2RC4LC1RA_3RB0LA2LC4LD4LC4LD (bbch)
BB(5,6)	$>f_{\omega +3}(31)$	1LE3LB2LA2RA4LB5RA_1RZ3RB1LC2RA3RD4RA_3RB1LB3LC2RC4LC2LB_3RB0LA5LE4LD4LC4LD_4LC5LC0RE5LE1RE2RE (bbch)
BB(6,6)	$>f_{\omega \times 2}(89)$	4LF3LB1RZ2RA4LB---_2LC3RB1LD2RA3LF---_3RB1LB3LC2RC4LC0LE_3RB---3LC2RC---3RE_5RC3RE---4LC------_5RB0LF1RB1LF---5RB (bbch)
BB(7,6)	$>f_{{\omega }^2}(110)$	5LG3LB---2RA4LB0LC_4LG3RB1LD2RA3LF5RB_3RB1LB3LC2RC4LC1LE_3RB3RE3LC2RC---3RD_5RB3RE0LE4LC3LG5LE_5RB5RB2LB1LF---5LF_5LF---0LG1LG---5LG (bbch)
BB(8,6)	$>f_{{\omega }^2+1}(f_{\omega }(31))$	5LH3LB2LH2RA4LB1RZ_2RC3RB1LD2RA3LF5RB_3RB1LB3LC2RC4LC1LE_3RB3RE3LC2RC---3RD_5RB3RE1LE4LC3LG5LE_5RB5RB---1LF5LF5LF_5LF4RG1LB1LG2LG5LG_0LC---1LH1LH---5RG (bbch)
BB(61,6)	$>f_{{\psi }_0({\mathrm{\Omega }}_2)}(1.7\cdot 10^{352})$

7 Symbols:	Runtime	Champions	Reference
BB(2,7)	$>10\uparrow \uparrow 10\uparrow \uparrow 10\uparrow \uparrow 155$	1RB3RB4LA1LB5LA6LB5RA_2LA6RA4RB1RZ3LB6LA4RB (bbch)
BB(3,7)	$>f_{\omega +1}(117)>g_{64}$	6LC3LB6RA2RA4LB5LC5LA_1RZ3RB1LC2RA3RB4LC5RA_3RB1LB3LC2RC4LC1RA6LA (bbch)
BB(4,7)	$>f_{\omega +3}(34)$	5LC3LB6LA2RA4LB2LD3RB_1RZ3RB1LC2RA3RD2LC4LC_3RB1LB3LC2RC4LC1RA5LD_3RB5LD6LC4LD4LC4LD6LC (bbch)
BB(18,7)	$>f_{{\epsilon }_0}(1.7\cdot 10^{352})$	1RB2LA1RA2LB2LA------_0LA2RB3RB4RA1LP------_0RZ1RC2LD------------_0LJ3RD2RD2RD4RD------_4LE1LE0RG1LR0RF2LE4LE_1LE1RF5RF---6RF------_0LH1RG2RG---4RG------_0RJ0LI------4RJ------_2LE1LI2LI---4LI------_4RO---0LE---0LJ------_2RP---2LK---4LK------_2LM---2RL3RL4RL------_4RP2RP2LM3LM4LM------_4LM---2RN3RN4RN------_3LK1LO2LO1LP4LO------_1RC3RQ1RL3LO0RN------_3LK1RQ2RQ0RQ4RQ------_1RC1LR2LR1LR4LR------ (bbch)
BB(46,7)	$>f_{{\psi }_0({\mathrm{\Omega }}_2)}(1.7\cdot 10^{352})$
BB(134,7)	$>f_{{\psi }_0({\mathrm{\Omega }}_{\omega })}(2050)$

8 Symbols or more:	Runtime	Champions	Reference
BB(2,8)	$>10\uparrow \uparrow 10\uparrow \uparrow 10\uparrow \uparrow 10\uparrow \uparrow 155$	1RB3RB4LA1LB5LA6LB5RA1RZ_2LA6RA4RB7RA3LB6LA4RB4RA (bbch)
BB(17,8)	$>f_{{\epsilon }_0}(1.7\cdot 10^{352})$	1RB2LA1RA2LB2LA---------_0LA2RB3RB4RA1LO---------_0RZ1RC2LD---------------_0LJ3RD2RD2RD4RD---------_4LE1LE0RG1LQ0RF2LE4LE---_1LE1RF5RF---6RF---------_0LH1RG2RG---4RG---------_0RJ0LI------4RJ---------_2LE1LI2LI---4LI---------_4RN---0LE---0LJ---------_2RO2RO2LK3LK4LK2LK4LK4RO_2LK---5RL3RL6RL---------_4LK---5RM3RM6RM---------_3LK1LN2LN1LO4LN---------_1RC3RP1RL3LN7RM---------_3LK1RP2RP0RP4RP---------_1RC1LQ2LQ1LQ4LQ--------- (bbch)
BB(2,9)	$>10\uparrow \uparrow 10\uparrow \uparrow 10\uparrow \uparrow 10\uparrow \uparrow 10\uparrow \uparrow 155$	1RB3RB4LA1LB5LA6LB5RA8RA1RZ_2LA6RA4RB7RA3LB6LA4RB4RA4RA (bbch)
BB(42,9)	$>f_{{\psi }_0({\mathrm{\Omega }}_2)}(1.7\cdot 10^{352})$

Maximum Score Function (Σ(n,m))

Maximum amount of non-zero symbols a Turing machine with n states and m symbols can leave on the tape before halting when started on the blank tape.

2 Symbols:	Score	Champions	Reference
Σ(1)	1	1RZ--- (bbch)
Σ(2)	4	1RB1LB_1LA1RZ (bbch)
Σ(3)	6	1RB1RZ_0RC1RB_1LC1LA (bbch) 1RB1RC_1LC1RZ_1RA0LB (bbch) 1RB1LC_1LA1RB_1LB1RZ (bbch) 1RB1RA_1LC1RZ_1RA1LB (bbch) 1RB1LC_1RC1RZ_1LA0LB (bbch)
Σ(4)	13	1RB1LB_1LA0LC_1RZ1LD_1RD0RA (bbch) 1RB0RC_1LA1RA_1RZ1RD_1LD0LB (bbch)
Σ(5)	4098	1RB1LC_1RC1RB_1RD0LE_1LA1LD_1RZ0LA (bbch) 1RB1RA_1LC1LB_1RA1LD_1RA1LE_1RZ0LC (bbch)
Σ(6)	> 10 ↑↑ 10 ↑↑ 10 ↑↑ 8.10237	1RB1RA_1RC1RZ_1LD0RF_1RA0LE_0LD1RC_1RA0RE (bbch)
Σ(7)	$>3{\uparrow }^{20}3>f_{\omega }(20)$	1RB0RG_1RC1RB_0RD1RZ_0LE0LD_0LF1LE_1RA1LF_1LC0RB (bbch)

3 Symbols:	Score	Champions	Reference
Σ(1,3)	1	1RZ------ (bbch)
Σ(2,3)	9	1RB2LB1RZ_2LA2RB1LB (bbch)
Σ(3,3)	≥ 374,676,383	0RB2LA1RA_1LA2RB1RC_1RZ1LB1LC (bbch)
Σ(4,3)	$>2\uparrow \uparrow \uparrow 2\uparrow \uparrow \uparrow 2\uparrow \uparrow \uparrow (7.92\times 10^{28})$	1RB1RD1LC_2LB1RB1LC_1RZ1LA1LD_0RB2RA2RD (bbch)

4 Symbols:	Score	Champions	Reference
Σ(1,4)	1	1RZ--------- (bbch)
Σ(2,4)	2050	1RB2LA1RA1RA_1LB1LA3RB1RZ (bbch)
Σ(3,4)	$\ge (2{\uparrow }^{15}5)+14$	1RB3LB1RZ2RA_2LC3RB1LC2RA_3RB1LB3LC2RC (bbch)

5 Symbols:	Score	Champions	Reference
Σ(1,5)	1	1RZ------------ (bbch)
Σ(2,5)	$>10^{10^{10^{3314360}}}$	1RB3LA4RB0RB2LA_1LB2LA3LA1RA1RZ (bbch)

6 Symbols:	Score	Champions	Reference
Σ(1,6)	1	1RZ--------------- (bbch)
Σ(2,6)	$>10\uparrow \uparrow 10\uparrow \uparrow 10^{10^{115}}$	1RB3RB5RA1LB5LA2LB_2LA2RA4RB1RZ3LB2LA (bbch)

Beeping Busy Beavers

Beeping Busy Beaver (BBB(n,m))

Considering beep states

2 Symbols:	Steps taken	Champions	Reference
BBB(1)	1
BBB(2)	6	1RB1LB_1LB1LA (bbch)
BBB(3)	55	1RB0LB_1LA0RC_1LC1LA (bbch)
BBB(4)	32,779,478	1RB1LD_1RC1RB_1LC1LA_0RC0RD (bbch)
BBB(5)	$\ge 10^{14006}$	1RB1LE_0LC0LB_0LD1LC_1RD1RA_0RC0LA (bbch)

3 Symbols:	Steps taken	Champions	Reference
BBB(1,3)
BBB(2,3)	59	1RB2LB1LA_2LB2RA0RA (bbch)
BBB(3,3)	≥ 10 ↑↑ 6.74	1RB0LB2LA_1LA0RC0LB_2RC2RB0LC (bbch)

4 Symbols:	Steps taken	Champions	Reference
BBB(1,4)
BBB(2,4)	$\ge 205770076433044242247859>2\times 10^{23}$	1RB2LA1RA1LB_0LB2RB3RB1LA (bbch)

Beeping Booping Busy Beaver (BBBB(n,m))

Domain	Value	Champions	Reference
BBBB(1)	2	0RA--- (bbch) (beep: any, boop: A0)
BBBB(2)	18	0RB1LB_1LA1RB (bbch) (beep: A0, boop: A1)
BBBB(3)	≥ 127	1RB1LB_0RC0LA_1LC0LA (bbch) (beep: A0, boop: B1)
BBBB(2,3)	≥ 187	2RB2LA1RA_1LB1LA0RB (bbch) (beep: B0, boop: B2)

Maximum Consecutive Ones Function (Num(n,m))

Domain	Number of Ones	Champions	Reference
num(1)	1	1RZ--- (bbch)
num(2)	4	1RB1LB_1LA1LZ (bbch)
num(3)	6	1RB1LC_1RC1LZ_1LA0LB (bbch)
num(4)	12	1RB0LA_1RC1LB_1LB1RD_1RZ0RA (bbch)
num(5)	165	1RB1LA_1RC1LE_1RD1RE_0LA1RC_1RZ0LB (bbch) 0RB1LD_1LC1RB_1LD1RE_1LA1LE_1LZ0RC (bbch)
num(6)	≥ ≈ 10↑↑15.60465	1RB0LD_1RC0RF_1LC1LA_0LE0RZ_1LF0RB_0RC0RE (bbch)
num(2,3)	6	1RB1LA1LB_0LA2RA1RZ (bbch)
num(3,3)	≥ 95524079	1RB2RC1LA_2LA1RB1RZ_2RB2RA1LC (bbch)
num(4,3)	$>10{\uparrow }^{4}4$	1RB1RD1LC_2LB1RB1LC_1RZ1LA1LD_0RB2RA2RD (bbch)
num(4,4)	$>2{\uparrow }^{15}5$	1RB3LB1LD2RA_2LC3RB1LC2RA_3RB1LB3LC2RC_1LZ---1LD1LD (bbch)

Maximum Space Function (BB_space(n,m))

Domain	Cells visited	Champions	Reference
BBspace(1,2)	1	1RZ--- (bbch)
BBspace(2,2)	4	1RB1LB_1LA1RZ (bbch) and 1RB0LB_1LA1RZ (bbch)
BBspace(3,2)	7	1RB1RC_1LC1RZ_1RA0LB (bbch) and 1RB0RC_1LC1RZ_1RA0LB (bbch)
BBspace(4,2)	16	1RB0RA_1LC0RD_0LD0LB_1RA1RZ (bbch)
BBspace(5,2)	12289	1RB1LC_1RC1RB_1RD0LE_1LA1LD_1RZ0LA (bbch)
BBspace(1,3)	1	1RZ------ (bbch)
BBspace(2,3)	9	1RB2LB1RZ_2LA2RB1LB (bbch)
BBspace(2,4)	2050	1RB2LA1RA1RA_1LB1LA3RB1RZ (bbch)

Size of the runtime spectrum (R(n,m))

There currently doesn't seem to be any available information about values of this function.

Reversible Turing Machines

Maximum Shifts Function (BB_rev(n,m))

Domain	Steps	Champions	Reference
BBrev(1)
BBrev(2)	6	0RB1RZ_1LA1RB (bbch)
BBrev(3)	17	0RB1RZ_0LC1RA_1RB1LC (bbch)
BBrev(4)	48	1RB0LD_0LC0RB_1LA1LD_1LC1RZ (bbch)
BBrev(5)	388	1RB0RD_1RC0RB_1RD1RZ_1LE1LA_0LE0LA (bbch)
BBrev(6)	≥ 537,556	1RB1LD_1LC1RE_0LD0LC_0RE0RF_0RA1RZ_1RF1RA (bbch)
BBrev(7)	$>10^{19}$	1RB1LD_0LC0LD_1LC1LA_0LA1RE_0RF0RE_0RG1RF_0RB1RZ (bbch)

Maximum Score Function (Σ_rev(n,m))

Domain	Score	Champions	Reference
Σrev(1)
Σrev(2)	≥ 2	0RB1RZ_1LA1RB (bbch)
Σrev(3)	≥ 4	0RB1RZ_0LC1RA_1RB1LC (bbch)
Σrev(4)	≥ 8	1RB0LA_1LC1RD_1LA0LC_0RB1RZ (bbch)
Σrev(5)	≥ 16	1RB0RD_1RC0RB_1RD1RZ_1LE1LA_0LE0LA (bbch)
Σrev(6)	≥ 1161	1RB1LD_1LC1RE_0LD0LC_0RE0RF_0RA1RZ_1RF1RA (bbch)

Blanking Busy Beaver (BLB(n,m))

2 Symbols:	Steps	Champions	Reference
BLB(1)	nonexistent	nonexistent
BLB(2)	8	1RB0RA_1LB1LA (bbch)
BLB(3)	34	1RB1LB_1LA1LC_1RC0LC (bbch)
BLB(4)	≥ 32,779,477	1RB1LD_1RC1RB_1LC1LA_0RC0RD (bbch)
BLB(5)	> 1014,006	1RB1LE_0LC0LB_0LD1LC_1RD1RA_0RC0LA (bbch)
BLB(6)	> 10 ↑↑ 16	1RB0LD_1RC0RF_1LC1LA_0LE1RE_1LF0RB_0RC0RE (bbch)
BLB(7)	> 10^183.76332	1RB0RF_1RC1RA_1LD0LA_0RG0RE_0RA1LF_0LE0LC_1RZ0RD (bbch)

3 Symbols:	Steps	Champions	Reference
BLB(1,3)	nonexistent	nonexistent
BLB(2,3)	77	1RB2LA0RB_1LA0LB1RA (bbch)
BLB(3,3)	> 10 ↑↑ 6.54	1RB1RC2RA_0RC2RA0RB_2LC2LB0LA (bbch)

4 Symbols:	Steps	Champions	Reference
BLB(1,4)	nonexistent	nonexistent
BLB(2,4)	≥ 1,367,361,263,049	1RB2RA1RA2RB_2LB3LA0RB0RA (bbch)

5 Symbols:	Steps	Champions	Reference
BLB(2,5)	> 1032	1RB2RB4RA0RB2RA_2LB3LA0RB0RA1RB (bbch)

Busy Cleaner (BB_clean(n,m))

Domain	Steps	Champions	Reference
BBclean(2)	≥ 4
BBclean(3)	≥ 12
BBclean(4)	≥ 34
BBclean(5)	≥ 187

Lazy Beaver

Shifts Function (LB(n,m))

	1 State	2 States	3 States	4 States	5 States	6 States
2 Symbols	2	7	22	72	427	8407
3 Symbols	2	23	351	189,270
4 Symbols	2	93	242,789
5 Symbols	2	956
6 Symbols	2	33,851

Period-oriented Busy Beavers

Busy Preperiodic Beaver (BBS(n,m))

Domain	Preperiod	Champions	Reference
BBS(1,2)	0	1RA--- (bbch)
BBS(2,2)	≥ 9	1RB0LB_1LA0RB (bbch) proven winner?
BBS(3,2)	101	1RB1LB_0RC0LA_1LC0LA (bbch)
BBS(4,2)	≥ 119,120,230,102	1RB1LC_0LA1RD_0RB0LC_1LA0RD (bbch)
BBS(5,2)	> 1014,006	1RB1LE_0LC0LB_0LD1LC_1RD1RA_0RC0LA (bbch)
BBS(1,3)	0	1RA------ (bbch)
BBS(2,3)	≥ 165	1RB0LA---_1LB2LA0RB (bbch)
BBS(3,3)	> 10 ↑↑ 6	1RB0LB2LA_1LA0RC0LB_2RC2RB0LC (bbch)
BBS(4,3)	> $10{\uparrow }^{4}4$	1RB1RD1LC_2LB1RB1LC_1LB1LA1LD_0RB2RA2RD (bbch)
BBS(1,4)	0	1RA--------- (bbch)
BBS(2,4)	≥ 205,770,076,433,044,242,247,860	1RB2LA1RA1LB_0LB2RB3RB1LA (bbch)

Busy Periodic Beaver (BBP(n,m))

Domain	Period	Champions	Reference
BBP(1,2)	1	1RA--- (bbch)
BBP(2,2)	≥ 9	1RB0RB_1LB1RA (bbch) proven winner?
BBP(3,2)	92	1RB0LA_0RC1LA_1LC0RB (bbch)
BBP(4,2)	≥ 212,081,736	1RB0LA_0RC1RD_1LD0RB_1LA1RB (bbch)
BBP(5,2)	≥ 8,468,569,863	1LC1LE_---1LD_1RD0LD_1LA1RE_0LB0RC (bbch)
BBP(6,2)	$>2.4154\times 10^{2695}$	1RB1LC_1LA1RB_1LD0LA_1RE1RD_---1RF_1LB0RF (bbch), 1RB1LA_1LA1RC_1RD0RB_1LE1LD_---1LF_1RA0LF (bbch)
BBP(1,3)	1	1RA------ (bbch)
BBP(2,3)
BBP(3,3)	≥ 1,195	1RB2RC1LC_0RC0RB1LA_2LA2RC1LB (bbch)
BBP(1,4)	1	1RA--------- (bbch)
BBP(2,4)	≥ 33,209,131	1RB0RA3LB1RB_2LA0LB1RA2RB (bbch)

Instruction-Limited Busy Beaver

Instruction-Limited Classical Busy Beaver Functions

Instruction-Limited Maximum Shifts Function (BBi(n))

	Steps	Champions	Classical Domain	Reference
BBi(1)	1	0RH (bbch) 1RH--- (bbch)	BB(1)
BBi(2)	3	0RB---_1LA--- (bbch)	BB(2)
BBi(3)	5	1RB1LB_1LA--- (bbch)	BB(2)
BBi(4)	16	1RB---_0RC---_1LC0LA (bbch)	BB(3)
BBi(5)	37	1RB2LB---_2LA2RB1LB (bbch)	BB(2,3)
BBi(6)	123	1RB3LA1RA0LA_2LA------3RA (bbch)	BB(2,4)
BBi(7)	3,932,963	1RB2LA1RA1RA_1LB1LA3RB--- (bbch) 1RB2LA1RA_1LC1LA2RB_---1LA--- (bbch)	BB(2,4)
BBi(8)	$>6.889\times 10^{1565}$	1RB1LA------_1RC3LB1RB---_2LA2LC---0LC (bbch)	BB(3,4)
BBi(9)	$>10^{10^{10^{3314360}}}$	1RB3LA4RB0RB2LA_1LB2LA3LA1RA--- (bbch)	BB(2,5)
BBi(10)
BBi(11)	$>2{\uparrow }^{15}5$	1RB3LB---2RA_2LC3RB1LC2RA_3RB1LB3LC2RC (bbch)	BB(3,4)
BBi(12)	$>2{\uparrow }^{18}3$	0RD3LB---2RA_2LC3RB1LC2RA_3RB1LB3LC2RC_1RB--------- (bbch)	BB(4,4)
BBi(13)	$>2{\uparrow }^{98}4>f_{\omega }(97)$	1LD3LB---2RA_2LC3RB1LC2RA_3RB1LB3LC2RC_0LB---2LB--- (bbch)	BB(4,4)
BBi(14)	$>f_{\omega }(2{\uparrow }^{15}5)$	1RB3LB4LC2RA4LB_2LC3RB1LC2RA---_3RB1LB3LC2RC4LC (bbch)	BB(3,5)
BBi(15)	$>f_{\omega }^3(12)$	1RB0RA_1LC1LF_1RD0LB_1RA1LE_1LH0LC_1RG1LD_0RG0RF_1RG--- (bbch)	BB(8)
BBi(16)
BBi(17)	$>f_{\omega }^{11}(15)$	1RB3LB4LC2RA4LB_2LC3RB1LC2RA4RD_3RB1LB3LC2RC4LC_3RC------3RA--- (bbch)	BB(4,5)
BBi(18)	$>f_{\omega +1}(2611)>g_{64}$	1RB3LB4LC2RA4LB_2LC3RB1LC2RA4RD_3RB1LB3LC2RC4LC_1LC3LC---1RD--- (bbch)	BB(4,5)
BBi(19)	$>f_{\omega +1}^2(2{\uparrow }^{6}4)$	5LD3LB---2RA4LB---_---3RB1LC2RA3RD2LC_3RB1LB3LC2RC4LC---_3RB---5LD4LD4LC4LD (bbch)	BB(4,6)
BBi(20)	$>f_{\omega +1}^4(f_{\omega }^2(2{\uparrow }^{6}4))$	5LD3LB---2RA4LB2RB_---3RB1LC2RA3RD3LB_3RB1LB3LC2RC4LC---_3RB---5LD4LD4LC4LD (bbch)	BB(4,6)
BBi(21)	$>f_{\omega +2}(f_{\omega +1}^2(2{\uparrow }^{6}4))$	2LF3LB---2RA4LB---_---3RB1LC2RA3RD---_3RB1LB3LC2RC4LC---_3RB---5LE4LD4LC4LD_4LC------5LE------_2LE--------------- (bbch)	BB(6,6)
BBi(22)	$>f_{\omega +2}^2(f_{\omega +1}^2(2{\uparrow }^{6}4))$	1RF3LB---2RA4LB---_---3RB1LC2RA3RD---_3RB1LB3LC2RC4LC---_3RB---5LE4LD4LC4LD_4LC2LF---5LE------_2LE--------------- (bbch)	BB(6,6)
BBi(23)	$>f_{\omega +3}(8)$	1LF3LB---2RA4LB---_---3RB1LC2RA3RD---_3RB1LB3LC2RC4LC---_3RB2LF5LE4LD4LC4LD_4LC------5LE------_4LE------2LF------ (bbch)	BB(6,6)
BBi(24)
BBi(25)	$>f_{\omega +5}(28)$	3LF3LB---2RA4LB---_2LF3RB1LD2RA3LF---_3RB1LB3LC2RC4LC0LE_3RB---3LC2RC---3RE_5RC3RE---4LC------_5RB---2LC1LF------ (bbch)	BB(6,6)
BBi(26)	$>f_{\omega \times 2}(36)$	5RB3LB---2RA4LB---_2LC3RB1LD2RA3LF---_3RB1LB3LC2RC4LC0LE_3RB3RD3LC2RC---3RE_5RC3RE1RB4LC------_5RB------1LF------ (bbch)	BB(6,6)
BBi(27)	$>f_{\omega \times 2}(89)$	4LF3LB---2RA4LB---_2LC3RB1LD2RA3LF---_3RB1LB3LC2RC4LC0LE_3RB---3LC2RC---3RE_5RC3RE---4LC------_5RB0LF1RB1LF---5RB (bbch)	BB(6,6)
BBi(28)
BBi(29)	$>f_{\omega \times 2}(f_{\omega +1}(f_{\omega }(30)))$	5LF3LB1LG2RA4LB---_---3RB1LD2RA3LF3LG_3RB1LB3LC2RC4LC0LE_3RB---3LC2RC---3RE_5RC3RE---4LC------_5RB---2LB1LF------_------1LG3LG---0LE (bbch)	BB(7,6)
BBi(30)	$>f_{\omega \times 2}^3(f_{\omega +2}(28))$	5LF3LB1LG2RA4LB---_---3RB1LD2RA3LF3LF_3RB1LB3LC2RC4LC0LE_3RB---3LC2RC---3RE_5RC3RE---4LC------_5RB---2LF1LF---5RA_------1LG3LG---0LE (bbch)	BB(7,6)
BBi(31)	$>f_{\omega \times 2+1}(19)$	5LF3LB1LG2RA4LB---_2LC3RB1LD2RA3LF2LB_3RB1LB3LC2RC4LC0LE_3RB---3LC2RC---3RE_5RC3RE2LE4LC------_5RB---2LE1LF------_------1LG3LG---0LE (bbch)	BB(7,6)
BBi(32)	$>f_{\omega \times 2+1}(130)$	5LF3LB1LG2RA4LB---_2LC3RB1LD2RA3LF2LB_3RB1LB3LC2RC4LC0LE_3RB---3LC2RC---3RE_5RC3RE2LF4LC---0RB_5RB---2LE1LF------_------1LG3LG---0LE (bbch)	BB(7,6)
BBi(33)
BBi(34)	$>f_{{\omega }^2}(5)$	2LG3LB---2RA4LB---_4LG3RB1LD2RA3LF5RB_3RB1LB3LC2RC4LC1LE_3RB3RE3LC2RC---3RD_5RB3RE---4LC3LG5LE_5RB5RB---1LF---5LF_5LF---1LC1LG---5LG (bbch)	BB(7,6)
BBi(35)	$>f_{{\omega }^2}(28)$	2LF3LB---2RA4LB3LD_3LA3RB1LD2RA3LF5RB_3RB1LB3LC2RC4LC1LE_3RB3RE3LC2RC---3RD_5RB3RE---4LC3LG5LE_5RB5RB0LF1LF---5LF_5LF------1LG---5LG (bbch)	BB(7,6)
BBi(36)	$>f_{{\omega }^2}(63)$	2LE3LB---2RA4LB2LD_0LA3RB1LD2RA3LF5RB_3RB1LB3LC2RC4LC1LE_3RB3RE3LC2RC---3RD_5RB3RE0LG4LC3LG5LE_5RB5RB---1LF---5LF_5LF---3RC1LG---5LG (bbch)	BB(7,6)
BBi(37)	$>f_{{\omega }^2}(110)$	5LG3LB---2RA4LB0LC_4LG3RB1LD2RA3LF5RB_3RB1LB3LC2RC4LC1LE_3RB3RE3LC2RC---3RD_5RB3RE0LE4LC3LG5LE_5RB5RB2LB1LF---5LF_5LF---0LG1LG---5LG (bbch)	BB(7,6)
...
BBi(41)	$>f_{{\omega }^2}^3(4\uparrow \uparrow 341)$	0LI0LF_0RJ1RG_0RD1LC_1RH1RE_1LO0RH_1LA1LF_0LC1LA_1RB1RH_1RD0LF_1LP0RK_0LM1LL_0LL1LM_1LE1LN_0RQ0LM_0RP1LO_1LR0RH_1LF1RQ_---0LS_1LH0LT_1LH1LU_0LE1LR (bbch)	BB(21)
BBi(42)	$f_{{\omega }^2+1}(29)$	5LH3LB2LH2RA4LB---_---3RB1LD2RA3LF5RB_3RB1LB3LC2RC4LC1LE_3RB3RE3LC2RC---3RD_5RB3RE1LE4LC3LG5LE_5RB5RB---1LF5LF5LF_5LF4RG1LB1LG2LG5LG_3RC---1LH1LH---5RG (bbch)	BB(8,6)
BBi(43)	$>f_{{\omega }^2+1}(f_{\omega }(31))$	5LH3LB2LH2RA4LB1RZ_2RC3RB1LD2RA3LF5RB_3RB1LB3LC2RC4LC1LE_3RB3RE3LC2RC---3RD_5RB3RE1LE4LC3LG5LE_5RB5RB---1LF5LF5LF_5LF4RG1LB1LG2LG5LG_0LC---1LH1LH---5RG (bbch)	BB(8,6)
...
BBi(57)	$>f_{{\omega }^{\omega }}(3)$	[5]	BB(29)
BBi(61)	$>f_{\omega \uparrow \uparrow 4}(3)$	[6]	BB(31)
BBi(65)	$>f_{\omega \uparrow \uparrow 6}(3)$	[7]	BB(33)
BBi(78)	$>f_{{\epsilon }_0}(1.7\cdot 10^{352})$	BB(19,5) machine code 1RB2LA1RA2LB2LA_0LA2RB3RB4RA1LQ_---1RC2LD------_0LK3RD2RD2RD4RD_------0RH1LS0RF_1LG1RF2RF---4RF_4LE1LG2LG---4LG_0LI1RH2RH---4RH_0RK0LJ------4RK_2LE1LJ2LJ---4LJ_4RP---0LE---0LK_2RQ---2LL---4LL_2LN---2RM3RM4RM_4RQ2RQ2LN3LN4LN_4LN---2RO3RO4RO_3LL1LP2LP1LQ4LP_1RC3RR1RM3LP0RO_3LL1RR2RR0RR4RR_1RC1LS2LS1LS4LS (bbch) BB(18,7) machine code 1RB2LA1RA2LB2LA------_0LA2RB3RB4RA1LP------_---1RC2LD------------_0LJ3RD2RD2RD4RD------_4LE1LE0RG1LR0RF2LE4LE_1LE1RF5RF---6RF------_0LH1RG2RG---4RG------_0RJ0LI------4RJ------_2LE1LI2LI---4LI------_4RO---0LE---0LJ------_2RP---2LK---4LK------_2LM---2RL3RL4RL------_4RP2RP2LM3LM4LM------_4LM---2RN3RN4RN------_3LK1LO2LO1LP4LO------_1RC3RQ1RL3LO0RN------_3LK1RQ2RQ0RQ4RQ------_1RC1LR2LR1LR4LR------ (bbch) BB(17,8) machine code 1RB2LA1RA2LB2LA---------_0LA2RB3RB4RA1LO---------_---1RC2LD---------------_0LJ3RD2RD2RD4RD---------_4LE1LE0RG1LQ0RF2LE4LE---_1LE1RF5RF---6RF---------_0LH1RG2RG---4RG---------_0RJ0LI------4RJ---------_2LE1LI2LI---4LI---------_4RN---0LE---0LJ---------_2RO2RO2LK3LK4LK2LK4LK4RO_2LK---5RL3RL6RL---------_4LK---5RM3RM6RM---------_3LK1LN2LN1LO4LN---------_1RC3RP1RL3LN7RM---------_3LK1RP2RP0RP4RP---------_1RC1LQ2LQ1LQ4LQ--------- (bbch)	BB(19,5), BB(18,7), BB(17,8)
BBi(94)	$>f_{{\epsilon }_1}(3)$	[8]	BB(48)
BBi(237)	$>f_{{\psi }_0({\mathrm{\Omega }}_2)}(1.7\cdot 10^{352})$		BB(42,9)
BBi(299)	$>f_{lim(BMS)}(10\uparrow \uparrow 15)$	too large to show	BB(150)
BBi(2029)	> D5(99) = Loader's Number		BB(1015)

Instruction-Limited Maximum Score Function (Σi(n))

	Score	Champions	Classical Domain	Reference
Σi(1)	1	1RH--- (bbch)	BB(1)
Σi(2)	2	1RB---_1LA--- (bbch)	BB(2)
Σi(3)	4	1RB1LB_1LA--- (bbch)	BB(2)
Σi(4)	5	1RB0LB---_1LA2RA--- (bbch)	BB(2,3)
Σi(5)	9	1RB2LB---_2LA2RB1LB (bbch)	BB(2,3)
Σi(6)	14	1RB3LA1RA0LA_2LA------3RA (bbch)	BB(2,4)
Σi(7)	2050	1RB2LA1RA1RA_1LB1LA3RB--- (bbch) 1RB2LA1RA_1LC1LA2RB_---1LA--- (bbch)	BB(2,4)
Σi(8)	$>1.355\times 10^{783}$	1RB1LA------_1RC3LB1RB---_2LA2LC---0LC (bbch)	BB(3,4)
Σi(9)	$>10^{10^{10^{3314360}}}$	1RB3LA4RB0RB2LA_1LB2LA3LA1RA--- (bbch)	BB(2,5)

Instruction-Limited Blanking Busy Beaver (BLBi(n))

	Steps	Champions
BLBi(1)	nonexistent	nonexistent
BLBi(2)	nonexistent	nonexistent
BLBi(3)	4	1RB0RA_1LA--- (bbch)
BLBi(4)	12	1RB---_1RC---_1LC0RC (bbch)
BLBi(5)	30	1RB------_1RC------_2LC2RC0RC (bbch)
BLBi(6)	77	1RB2LA0RB_1LA0LB1RA (bbch)
BLBi(7)	808	1RB------_1RC------_0RD2LC---_1LD2RD0RC (bbch)
BLBi(8)	≥ 1,367,361,263,049	1RB2RA1RA2RB_2LB3LA0RB0RA (bbch)
BLBi(9)	> 1042,745	1RB2RB1LA_2LC0LB2LB_2RC2RA0LC (bbch)

Instruction-Limited Greedy Busy Beaver (gBBi(n))

	Steps	Champions
gBBi(1)	1
gBBi(2)	3
gBBi(3)	5
gBBi(4)	13
gBBi(5)	19
gBBi(6)	25
gBBi(7)	41
gBBi(8)	55
gBBi(9)	238
gBBi(10)	941
gBBi(11)	1341
gBBi(12)	10465
gBBi(13)	10675
gBBi(14)	≥ 9,874,580	0RB6RB1LB---3LA1RB7RB2LB_1LA2RB3LA4RB5RB1LB5LA--- (bbch)

Program-Limited Busy Beaver

Busy Beaver for Lambda Calculus

Regular Busy Beaver for Lambda Calculus (BBλ(n))

For n = 0,1,2,3,5 BBλ(n) is undefined, while for the rest of $20\ge n$ BBλ(n) = n.

	BBλ(n)	Champions
BBλ(4)	4	$\lambda 1$
BBλ(6)	6	$\lambda \lambda 1$
BBλ(7)	7	$\lambda \lambda 2$
BBλ(8)	8	$\lambda \lambda \lambda 1$
BBλ(9)	9	$\lambda \lambda \lambda 2$
BBλ(10)	10	$\lambda \lambda \lambda \lambda 1$
BBλ(11)	11	$\lambda \lambda \lambda \lambda 2$
BBλ(12)	12	$\lambda \lambda \lambda \lambda \lambda 1$
BBλ(13)	13	$\lambda \lambda \lambda \lambda \lambda 2$
BBλ(14)	14	$\lambda \lambda \lambda \lambda \lambda \lambda 1$
BBλ(15)	15	$\lambda \lambda \lambda \lambda \lambda \lambda 2$
BBλ(16)	16	$\lambda \lambda \lambda \lambda \lambda \lambda \lambda 1$
BBλ(17)	17	$\lambda \lambda \lambda \lambda \lambda \lambda \lambda 2$
BBλ(18)	18	$\lambda \lambda \lambda \lambda \lambda \lambda \lambda \lambda 1$
BBλ(19)	19	$\lambda \lambda \lambda \lambda \lambda \lambda \lambda \lambda 2$
BBλ(20)	20	$\lambda \lambda \lambda \lambda \lambda \lambda \lambda \lambda \lambda 1$
BBλ(21)	22	$\lambda (1(\lambda 2))(1(\lambda 2))$
BBλ(22)	24	$\lambda (11)(11)(11)$
BBλ(23)	26	$\lambda (1(\lambda \lambda 2))(1(\lambda \lambda 2))$
BBλ(24)	30	$\lambda (1(\lambda 1))(1(\lambda 1))(1(\lambda 1))$
BBλ(25)	42	$\lambda 1(\lambda 1(21))(1(1(\lambda 1(21))))$
BBλ(26)	52	$\lambda \lambda 2(\lambda \lambda 2(12))(1(2(\lambda \lambda 2(12))))$
BBλ(27)	44	$\lambda \lambda 1(\lambda 1(21))(1(1(\lambda 1(21))))$
BBλ(28)	58	$\lambda 1(\lambda \lambda 1(3(\lambda 2)))(1(\lambda 2(\lambda \lambda 1(4(\lambda 2)))))$
BBλ(29)	223	$\lambda (\lambda 11)(\lambda 1(1(21)))$
BBλ(30)	160	$(\lambda 111)(\lambda \lambda 2(12))$
BBλ(31)	267	$(\lambda 11)(\lambda \lambda 2(2(12)))$
BBλ(32)	298	$\lambda (\lambda 11)(\lambda 1(1(2(\lambda 2))))$
BBλ(33)	1812	$\lambda (\lambda 11)(\lambda 1(1(1(21))))$
BBλ(34)	327,686	$(\lambda 1111)(\lambda \lambda 2(21))$
BBλ(35)	$5\times 3^{3^3}+6=38127987424941>3.8\times 10^{13}$	$(\lambda 111)(\lambda \lambda 2(2(21)))$
BBλ(36)	$5\times 2^{2^{2^3}}+6>5.7\times 10^{77}$	$(\lambda 11)(\lambda 1(1(\lambda \lambda 2(21))))$
BBλ(37)	$BB\lambda (35)+2=5\times 3^{3^3}+8=38127987424943>3.8\times 10^{13}$	$\lambda (\lambda 111)(\lambda \lambda 2(2(21)))$
BBλ(38)	$5\times 2^{2^{2^{2^2}}}+6>10^{19729}$	$(\lambda 11111)(\lambda \lambda 2(21))$
BBλ(39)	$5\times 3^{3^{3^3}}+6>10^{3638334640024}$	$(\lambda 1111)(\lambda \lambda 2(2(21)))$
BBλ(40)	$\approx (2\uparrow \uparrow {)}^{15}33>10\uparrow \uparrow \uparrow 16$	$(\lambda 111)(\lambda 1(\lambda \lambda 2(21))1)$
BBλ(41)	$5\times 3^{3^{85}}+6>10^{1.7\times 10^{40}}$	$(\lambda 1(\lambda 11)1)(\lambda \lambda 2(2(21)))$
BBλ(42)	$\ge BB\lambda (40)+2>(2\uparrow \uparrow {)}^{15}33>10\uparrow \uparrow \uparrow 16$	$\lambda (\lambda 111)(\lambda 1(\lambda \lambda 2(21))1)$
BBλ(43)	$>2\uparrow \uparrow \uparrow 2\uparrow \uparrow \uparrow (\frac{2\uparrow \uparrow 8}{2})$	$(\lambda 11)(\lambda 1(\lambda 1(\lambda \lambda 2(21))2))$
BBλ(44)	$>10\uparrow \uparrow \uparrow 10\uparrow \uparrow \uparrow 16$	$(\lambda 1111)(\lambda 1(\lambda \lambda 2(21))1)$
BBλ(45)	$\ge BB\lambda (43)+2>2\uparrow \uparrow \uparrow 2\uparrow \uparrow \uparrow (\frac{2\uparrow \uparrow 8}{2})$	$\lambda (\lambda 11)(\lambda 1(\lambda 1(\lambda \lambda 2(21))2))$
BBλ(46)	$\ge BB\lambda (44)+2>10\uparrow \uparrow \uparrow 10\uparrow \uparrow \uparrow 16$	$\lambda (\lambda 1111)(\lambda 1(\lambda \lambda 2(21))1)$
BBλ(47)	$>f_{\omega }\left(f_5\left(2\right)\right)$	$(\lambda 111)(\lambda \lambda 1(12)(\lambda \lambda 2(21)))$
BBλ(48)	$>10\uparrow \uparrow \uparrow 10\uparrow \uparrow \uparrow 10\uparrow \uparrow \uparrow 16$	$(\lambda 11111)(\lambda 1(\lambda \lambda 2(21))1)$
BBλ(49)	$>f_{\omega +1}(\frac{2\uparrow \uparrow 6}{2})>\text{Graham's Number}$	$(\lambda 11)(\lambda 1(1(\lambda \lambda 12(\lambda \lambda 2(21)))))$
BBλ(61)	$>f_{{\omega }^{2\uparrow \uparrow 18-1}}\left(2\right)$	$(\lambda 111)(\lambda 1(1(\lambda \lambda \lambda 132(\lambda \lambda 2(21)))))$
BBλ(70)	$>f_{{\omega }^{\omega }2}\left(f_{{\omega }^{\omega }}\left(f_{{\omega }^{\omega }}\left(3\right)\right)\right)$	$(\lambda 11(\lambda 1(\lambda \lambda \lambda 1325)2)1)(\lambda \lambda 2(21))$
BBλ(74)	$>f_{{\omega }^{\omega }2+1}\left(7\right)$	$(\lambda 111(\lambda 1(\lambda \lambda \lambda 1325)2)1)(\lambda \lambda 2(21))$
BBλ(76)	$>f_{{\omega }^{{\omega }^3}}(2)$	$(\lambda 11(\lambda \lambda \lambda \lambda 14321)1111)(\lambda \lambda 2(21))$
BBλ(77)	$>f_{{\omega }^{\omega 2}}(3)$	$(\lambda 1(\lambda \lambda \lambda \lambda 14321)1111)(\lambda \lambda 2(2(21)))$
BBλ(80)	$>f_{{\omega }^{{\omega }^{14}}}(2)$	$(\lambda 111(\lambda \lambda \lambda \lambda 14321)1111)(\lambda \lambda 2(21))$
BBλ(82)	$>f_{{\omega }^{{\omega }^{\omega }}}(2\uparrow \uparrow \uparrow \uparrow 18)$	$(\lambda 1(\lambda 1(\lambda \lambda \lambda \lambda 14321)1111)1)(\lambda \lambda 2(21))$
BBλ(90)	$>f_{{\zeta }_0}\left(15\right)$	$(\lambda 11(\lambda \lambda \lambda \lambda 1444321)1111)(\lambda \lambda 2(21))$
BBλ(94)	$>f_{\psi ({\mathrm{\Omega }}_{\omega })}\left(12\right)$	$(\lambda 111(\lambda \lambda \lambda \lambda 1444321)1111)(\lambda \lambda 2(21))$
BBλ(95)	$>f_{\psi ({\mathrm{\Omega }}_{\omega })}\left(23\right)$	$(\lambda 11(\lambda \lambda \lambda \lambda 1444321)1111)(\lambda \lambda 2(2(21)))$
BBλ(96)	$>f_{\psi ({\mathrm{\Omega }}_{\omega })}\left(f_{{\omega }^{{\omega }^2}}\left(2\right)\right)$	$(\lambda 1(\lambda 1(\lambda \lambda \lambda \lambda 1444321)1111)1)(\lambda \lambda 2(21))$
BBλ(100)	$>f_{\psi ({\mathrm{\Omega }}_{\omega })+1}\left(4\right)$	$(\lambda 11(\lambda 1(\lambda \lambda \lambda \lambda 1444321)1111)1)(\lambda \lambda 2(21))$
BBλ(201)	$>q(5)$ (q is only proven to exceed all functions provably recursive in PA; the true value is likely much larger based on informal analysis)	too large to show
BBλ(331)	$>f_{\lim (\mathrm{BMS})}^3(5)$	too large to show
BBλ(1797)	$>D^5(99)$ (Loader's number)	too large to show

Oracle Busy Beaver for Lambda Calculus (BBλ₁(n))

Note that $f(n)=6+5\times BB\lambda (n)$.

	BBλ1(n)	Champions
BBλ1(1)	0
BBλ1(2)	2	$1$
BBλ1(3)	0
BBλ1(4)	4	$\lambda 1$
BBλ1(5)	5	$\lambda 2$
BBλ1(6)	6	$\lambda \lambda 1$
BBλ1(7)	7	$\lambda \lambda 2$
BBλ1(8)	26	$1(\lambda 1)$
BBλ1(9)	9	$\lambda \lambda \lambda 2$
BBλ1(10)	36	$1(\lambda \lambda 1)$
BBλ1(11)	41	$1(\lambda \lambda 2)$
BBλ1(12)	266	$1(1(\lambda 1))$
BBλ1(13)	51	$1(\lambda \lambda 2)$
BBλ1(14)	$f(36)=25\times 2^{2^{2^3}}+36>2.85\times 10^{78}$	$1(1(\lambda \lambda 1))$
BBλ1(15)	$f(41)=25\times 3^{3^{85}}+36>10^{1.7\times 10^{40}}$	$1(1(\lambda \lambda 2))$
BBλ1(16)	$f(266)$	$1(1(1(\lambda 1)))$
BBλ1(17)	$f(51)$	$1(1(\lambda \lambda \lambda 2))$
BBλ1(18)	$f^4(4)=f(f(266))$	$1(\lambda 1)1(\lambda 1)$
BBλ1(19)	$f^3(7)=f(f(41))$	$1(1(1(\lambda \lambda 2)))$
BBλ1(20)	$f^6(4)=f^4(266)$	$1(\lambda \lambda 1)1(\lambda 1)$
BBλ1(21)	$f^7(4)=f^5(266)$	$1(\lambda \lambda 2)1(\lambda 1)$
BBλ1(22)	$f^{26}(4)=f^{24}(266)$	$1(1(\lambda 1))1(\lambda 1)$
BBλ1(28)	$\ge f^{BB\lambda (f^3(4))}(4)$	$1(\lambda 1)1(\lambda 1)1(\lambda 1)$
BBλ1(29)	$\ge f^{BB\lambda (f^{BB\lambda (f^4(4))+4}(4))+BB\lambda (f^4(4))+5}(4)$	$1(\lambda 1)(\lambda 121)(\lambda 1)$

Busy Beaver for De Bruijn Lambda Calculus (De Bruijn index)

n	Value	Champion
7	≥ 7	\1 1 1 1 1 1
8	≥ 16	(\1 1) (\\2 (1 2))
9	≥ 68	(\1 1) (\\2 (2 (1 2)))
10	$>7.625\times 10^{12}$	(\1 1 1) (\\2 (2 (2 1)))
11	$>10^{7.625\times 10^{12}}$	(\1 1 1 1) (\\2 (2 (2 1)))
12	$>10{\uparrow }^{3}16$	(\1 1 1) (\1 (\\2 (2 1)) 1)
13	$>10{\uparrow }^{3}10{\uparrow }^{3}10{\uparrow }^{2}6$	(\1 1) (\1 (\1 (\\2 (2 1)) 2))
14	$>f_{\omega }\left(f_5\left(2\right)\right)$	(\1 1 1) (\\1 (1 2) (\\2 (2 1)))
15	$>f_{\omega +1}(10^{10^{19,727}})$	(\1 1) (\1 (1 (\\1 2 (\\2 (2 1)))))
18	$>f_{{\omega }^{\omega }}(2\uparrow \uparrow 18)$	(\1 1 1) (\1 (1 (\\\1 3 2 (\\2 (2 1)))))
19	$>f_{{\omega }^{\omega }2}(f_{{\omega }^{\omega }}^2(3))$	(\1 1 (\1 (\\1 3 2 5) 2) 1) (\2 (2 1)))
20	$>f_{{\omega }^{\omega }2+1}(7)$	(\1 1 1 (\1 (\\1 3 2 5) 2) 1) (\2 (2 1)))
21	$>f_{{\omega }^{{\omega }^2+\omega +2}}(2)$	(\1 1 (\\\\1 4 3 2 1) 1 1 1 1) (\\2 (2 1))
22	$>f_{{\omega }^{{\omega }^{14}}}(2)$	(\1 1 1 (\\1 4 3 2 1) 1 1 1 1) (\2 (2 1))
23	$>f_{{\zeta }_0}(15)$	(\1 1 (\\\\1 4 4 4 3 2 1) 1 1 1 1) (\\2 (2 1))
24	$>f_{\psi ({\mathrm{\Omega }}_{\omega })}(12)$	(\1 1 1 (\\\\1 4 4 4 3 2 1) 1 1 1 1) (\\2 (2 1))
25	$>f_{\psi ({\mathrm{\Omega }}_{\omega })}(f_{{\omega }^{\omega +2}}(2))$	(\1 (\1 (\\\\1 4 4 4 3 2 1) 1 1 1 1) 1) (\\2 (2 1))
26	$>f_{\psi ({\mathrm{\Omega }}_{\omega }+1)}(4)$	(\1 1 (\1 (\\\\1 4 4 4 3 2 1) 1 1 1 1) 1) (\\2 (2 1))

Busy Beaver for SKI calculus

Busy Beaver for SKI calculus

	Ξ₀(n)	Champion
Ξ₀(1)	1	S
Ξ₀(2)	2	SS
Ξ₀(3)	3	SSS
Ξ₀(4)	4	SSSS
Ξ₀(5)	6	SSS(SS)
Ξ₀(6)	17	SSS(SI)S
Ξ₀(7)	≥ 41	SSS(S(SS))S
Ξ₀(8)	≥ 80	SSK(S(SS)S)S
Ξ₀(9)	≥ 1561	S(SI)(SS)(SS)SS
Ξ₀(10)	≥ 1562	S(S(SI)(SS)(SS)SS)
Ξ₀(11)	≥ 1563	SS(S(SI)(SS)(SS)SS)
Ξ₀(12)	≥ 2↑2↑513*8-2	S(SI)(SSK)(S(S(KS)K)I)
Ξ₀(13)	> 2↑↑2↑↑2↑258	SI(SI)(SSK)(S(S(KS)K)I)
Ξ₀(14)	> 2↑↑2↑↑2↑258	SI(SI)(SSK)(S(S(KS)K)I)S
Ξ₀(15)	> 2↑↑2↑↑2↑↑34	S(S(SI)I(SSK))I(S(S(KS)K)I)
Ξ₀(16)	> 2↑↑↑19	S(S(SI))I(S(SSK)(K(S(S(KS)K)I)))
Ξ₀(17)	> 2↑↑↑↑2↑↑2↑↑258	S(SS(SSS)I)(SSK)(S(S(KS)K)I)
Ξ₀(18)	> 2↑↑↑↑2↑↑2↑↑258	S(SS(SSS)I)(SSK)(S(S(KS)K)I)S
Ξ₀(19)	> 2↑↑↑↑2↑↑↑17	SSI(SSK(S(S(KS)K)I))(S(K(S(SSK)))K)
Ξ₀(20)	> fω+1(2↑↑7/2-1) > Graham's Number	S(S(S(SI)))I(S(K(S(SS(K(K(S(S(KS)K)I))))))K)
Ξ₀(27)	> fω+2(2↑2↑21)	SI(SI(SI(S(S(K(SS(KI))))I)))(S(K(S(SSK)))K)(S(S(KS)K)I)
Ξ₀(28)	> fω+2(2↑2↑21)	S(SI(SI(SI(S(S(K(SS(KI))))I)))(S(K(S(SSK)))K)(S(S(KS)K)I))
Ξ₀(29)	> fω+3(2↑2↑21)	SI(SI(SI(SI(S(S(K(SS(KI))))I))))(S(K(S(SSK)))K)(S(S(KS)K)I)
Ξ₀(30)	> fω+3(2↑2↑21)	S(SI(SI(SI(SI(S(S(K(SS(KI))))I))))(S(K(S(SSK)))K)(S(S(KS)K)I))
Ξ₀(31)	> fω+4(2↑2↑21)	SI(SI(SI(SI(SI(S(S(K(SS(KI))))I)))))(S(K(S(SSK)))K)(S(S(KS)K)I)
Ξ₀(32)	> fω+4(2↑2↑21)	S(SI(SI(SI(SI(SI(S(S(K(SS(KI))))I)))))(S(K(S(SSK)))K)(S(S(KS)K)I))
Ξ₀(61)	> fε₀ (255)	SSK(S(S(KS)K)I)(S(S(S(SI(K(S(K(SS(K(SI(KI)))))(S(K(SS(K(S(K(S(K(S(K(SS(K(S(K(S(S(KS)K)(KK)))S))))K))S))K))))K))))(K(KI)))(K(SS(KI))))I)
Ξ₀(71)	> fψ(Ωω) (fωω65536 (2))	SSK(S(S(KS)K)I)(S(S(S(S(S(K(SS(KI))))(K(S(K(S(K(S(K(S(K(SS(KI)))))(S(S(K(S(KS)K))S)(KK))))))(S(K(S(S(K(S(KS)K))S)(KK)))(S(K(S(S(K(SS(KI)))(SS(KI)))))K)))))I)I)I)

Busy Beaver for SK calculus

	Ξ₀SK(n)	Champion
Ξ₀SK(n)(1)	1	S
Ξ₀SK(n)(2)	2	SS
Ξ₀SK(n)(3)	3	SSS
Ξ₀SK(n)(4)	4	SSSS
Ξ₀SK(n)(5)	6	SSS(SS)
Ξ₀SK(n)(6)	10	SSS(SS)S
Ξ₀SK(n)(7)	41	SSS(S(SS))S
Ξ₀SK(n)(8)	≥ 80	SSK(S(SS)S)S
Ξ₀SK(n)(9)	≥ 169	S(SS)(SS)(SS)SS
Ξ₀SK(n)(10)	≥ 1561	SS(SS)(SSS)SSS
Ξ₀SK(n)(11)	≥ 1562	S(SS(SS)(SSS)SSS)
Ξ₀SK(n)(12)	≥ 1563	S(S(SS(SS)(SSS)SSS))
Ξ₀SK(n)(13)	≥ 7811	S(SS)(SS)(SS(SS(SSS)))S
Ξ₀SK(n)(14)	≥ 2↑2097156*13-2	SSS(SSK)(SS(SK)(S(KS)K))
Ξ₀SK(n)(15)	≥ 2↑2↑2097156*3-2	SSS(SSK)(SS(SK)(S(KS)K))S
Ξ₀SK(n)(16)	> 2↑2↑2↑8193	S(SS(SS))(SSK)(SS(SK)(S(KS)K))
Ξ₀SK(n)(17)	> 2↑↑2↑↑2↑258	SSS(S(SK))(SSK)(SS(SK)(S(KS)K))
Ξ₀SK(n)(22)	> 2↑↑↑19	S(S(S(S(SK))))(S(SK))(S(SSK)(K(SS(SK)(S(KS)K)))
Ξ₀SK(n)(23)	> 2↑↑↑↑2↑↑↑17	SS(S(SK))(SSK(SS(SK)(S(KS)K)))(S(K(S(SSK)))K)
Ξ₀SK(n)(24)	> 2↑↑↑↑2↑↑↑19	S(SS(S(SK))(SSK(SS(SK)(S(KS)K)))(S(K(S(SSK)))K))
Ξ₀SK(n)(25)	> 3↑73	SS(S(SK))(SSK(SS(SS(SK))(S(KS)K)))(S(K(S(SSK)))K)
Ξ₀SK(n)(26)	> fω+1(2↑↑7/2-1) > Graham's number	S(S(S(S(SKS))))(SKS)(S(K(S(SS(K(K(SS(SK)(S(KS)K)))))))K)

Busy Beaver for BCKW calculus

	Ξ₀BCKW(n)	Champion
Ξ₀BCKW(1)	1	B
Ξ₀BCKW(2)	2	BB
Ξ₀BCKW(3)	3	BBB
Ξ₀BCKW(4)	11	WW(WB)
Ξ₀BCKW(5)	47	W(WW)(WB)
Ξ₀BCKW(6)	≥ 2↑256*6-1	WW(WC(WB))
Ξ₀BCKW(7)	> 2↑↑↑17	WW(C(WC)(WB))
Ξ₀BCKW(8)	> 2↑↑↑2↑↑↑17	W(WW)(C(WC)(WB))
Ξ₀BCKW(9)	> 2↑52↑↑↑↑2↑↑↑17	WW(WB(C(WC))(WB))
Ξ₀BCKW(10)	> fω+1(2↑↑6/2-1)	WW(C(WB)(C(CC(WB))))
Ξ₀BCKW(15)	> fω2^^18-1(2)	WW(C(WB)(B(BC(CC(WB)))(C(BC))))
Ξ₀BCKW(22)	> fψ(Ωω) (fωω65536 (2))	WB(W(W(W(C(BW)(B(B(B(BW)C))(BC(C(BWW))))))))(WB)

Brainfuck

	BBbrainf(n)	Champion	Reference
BBbrainf(0)	0
BBbrainf(1)	1	+
BBbrainf(2)	2	++
BBbrainf(3)	3	+++
BBbrainf(4)	4	++++
BBbrainf(5)	5	+++++
BBbrainf(6)	≥ 6	++++++
BBbrainf(7)	≥ 7	+++++++
BBbrainf(8)	≥ 8	++++++++
BBbrainf(9)	≥ 9	+++++++++
BBbrainf(10)	≥ 10	++++++++++
BBbrainf(11)	≥ 11	+++++++++++
BBbrainf(12)	≥ 12	++++++++++++
BBbrainf(13)	≥ 16	++++[->++++<]
BBbrainf(14)	≥ 20	+++++[->++++<]
BBbrainf(15)	≥ 25	+++++[->+++++<]
BBbrainf(16)	≥ 176	++[>+++++[-<]>>]
BBbrainf(17)	≥ 3,125	++[>++++++[-<]>>]
BBbrainf(18)
BBbrainf(19)
BBbrainf(20)	≥ 4,212	+[->++++++++++[-<]>]
BBbrainf(21)	≥ 6,234	+++[>+++++++++[-<]>>]
BBbrainf(22)	≥ 90,963	+++[>++++++++++[-<]>>]
BBbrainf(23)	≥ 7,467,842	+++[>+++++++++++[-<]>>]
BBbrainf(24)	≥ 239,071,921	+++[>++++++++++++[-<]>>]

Boolfuck

Boolfuck score (Σ_boolf(n))

	Σboolf(n)	Champion
BBboolf(1)	1	*
BBboolf(2)	1	*>
BBboolf(3)	2	*>*
BBboolf(4)	2	*>*>
BBboolf(5)	3	*>*>*
BBboolf(6)	3	*>*>*>
BBboolf(7)	4	*>*>*>*
BBboolf(8)	4	*>*>*>*>
BBboolf(9)	= 5	*>*>*>*>*
BBboolf(10)	5	*>*>*>*>*>
BBboolf(11)	6	*>*>*>*>*>*
BBboolf(12)	7	*[>*>>>*<<<]
BBboolf(13)	≥ 8	*[>*>>>*<<<]*
BBboolf(14)	≥ 11	*[>>*[<<<*<]>]
BBboolf(15)	≥ 12	*[>>*[<<<*<]>]*
BBboolf(16)	≥ 15	*[>>*[[<<<]*<]>]
BBboolf(17)	≥ 31	*[>*[>>*[<<]*>]>]

Boolfuck runtime (S_boolf(n))

	Sboolf(n)	Champion	Reference
Sboolf(1)	1	*
Sboolf(2)	2	*>
Sboolf(3)	3	*>*
Sboolf(4)	4	*>*>
Sboolf(5)	5	*>*>*
Sboolf(6)	8	*>*[<]
Sboolf(7)	10	*>*[*<]
Sboolf(8)	14	*[>*>*<]
Sboolf(9)	18	*[[>]<<*]
Sboolf(10)	30	*[>*[<]>>]
Sboolf(11)	35	*[>*[<]*>>]
Sboolf(12)	72	*[>*[<<*<]>]
Sboolf(13)	≥ 120	*[>*>*[<*<]>]
Sboolf(14)	≥ 158	*[>>*[<<<*<]>]
Sboolf(15)	≥ 276	*[[>*[<<<]>]>>]
Sboolf(16)	≥ 352	*[>>*[[<<<]*<]>]
Sboolf(17)	≥ 871	*[[>*>*[<]<]>*>>]
Sboolf(18)	≥ 7,981	*[[>>*[<]*<]>>>*<]
Sboolf(19)	≥ 32,167	*[>*[>>*>]<[<<]*>>]
Sboolf(20)	≥ 4,359,966	*[*>*[<<]*>>>*>[>]<]
Sboolf(21)	≥ 505,033,483,078	*[>>*[[<]*<[>>]*>*]>]

CounterScript

Macros for compression:

	Macro	Definition	Size	Function
Constant Addition	A+=n;	increment A by n	n	A++; repeated n times
Transfer	A>>B*n;	increment B by A*n then set A to 0	n+2	while A {A--; (B++; repeated n times)}

	BBCS(n)	Champion
BBCS(1)	1	A++;
BBCS(2)	2	A++; A++;
BBCS(3)	3	A++; A++; A++;
BBCS(4)	4	A++; A++; A++; A++;
BBCS(5)	5	A++; A++; A++; A++; A++;
BBCS(6)	6	A++; A++; A++; A++; A++; A++;
BBCS(7)	7	A++; A++; A++; A++; A++; A++; A++;
BBCS(8)	9	A++; A++; A++; while A {A--; B++; B++; B++;}
BBCS(9)	12	A++; A++; A++; A++; while A {A--; B++; B++; B++;}
BBCS(10)	16	A++; A++; A++; A++; while A {A--; B++; B++; B++; B++;}
BBCS(11)	20	A++; A++; A++; A++; A++; while A {A--; B++; B++; B++; B++;}
BBCS(12)	≥ 25	A++; A++; A++; A++; A++; while A {A--; B++; B++; B++; B++; B++;}
BBCS(13)	≥ 42	A++; while A {A++; while B {A--; B--; C++; C++;} C>>B*2; C++;}
BBCS(14)	≥ 129	A++; while A {A++; while B {A--; B--; C++; C++;} C>>B*3; C++;}
BBCS(15)	≥ 340	A++; A++; A++; A++; while A {A--; B++; while B {B--; C++; C++;} while C {C--; B++; B++;}}
BBCS(16)	≥ 1,554	A++; A++; A++; A++; while A {A--; B++; while B {B--; C++; C++; C++;} while C {C--; B++; B++;}}
BBCS(17)	≥ 9,330	A++; A++; A++; A++; A++; while A {A--; B++; while B {B--; C++; C++; C++;} while C {C--; B++; B++;}}
BBCS(18)	≥ 66,429	A++; A++; A++; A++; A++; while A {A--; B++; while B {B--; C++; C++; C++;} while C {C--; B++; B++; B++;}}
BBCS(19)	≥ (3^122 - 3)/2	A++; while A {A++; while B {A--; B--; C++;} while C {B++; C--; B>>D*3; D>>B;} C++;}
BBCS(20)	≥ 2^65536 - 2	A+=4; while A {A--; B++; while B {B--; C++; C>>D*2; D>>C;} C>>B;}
BBCS(21)	≥ 2^2^65536 - 2	A+=5; while A {A--; B++; while B {B--; C++; C>>D*2; D>>C;} C>>B;}
BBCS(22)	≥ 2^^7 - 2	A+=6; while A {A--; B++; while B {B--; C++; C>>D*2; D>>C;} C>>B;}
BBCS(23)	≥ 2^^8 - 2	A+=7; while A {A--; B++; while B {B--; C++; C>>D*2; D>>C;} C>>B;}
BBCS(24)	≥ 2^^65536 - 2	A++; while A {A++; while B {A--; B--; C++;} while C {B++; C--; while B {B--; D++; D>>E*2; E>>D;} D>>B;} C++;}
BBCS(25)	> 2^^2^^6	A++; while A {A++; while B {A--; B--; C+=2;} while C {B++; C--; while B {B--; D++; D>>E*2; E>>D;} D>>B;} C++;}
BBCS(26)	≥ 2^^2^^65536 - 2	A++; A++; A++; A++; while A {A--; B++; while B {B--; C++; while C {C--; D++; while D {D--; E++; E++;} while E {E--; D++;}} while D {D--; C++;}} while C {C--; B++;}}
BBCS(64)	> Graham's number	too large to show
BBCS(85)	> q(5)	too large to show, see Discord

Fractran (BBf(n))

n	BBf(n)	Example Champion	Vector Representation
BBf(2)	1	[1/2]	$\left[\begin{array}{c}-1\end{array}\right]$
BBf(3)	1	[3/2]	$\left[\begin{array}{cc}-1& 1\end{array}\right]$
BBf(4)	1	[9/2]	$\left[\begin{array}{cc}-1& 2\end{array}\right]$
BBf(5)	2	[3/2, 1/3]	$\left[\begin{array}{cc}-1& 1\\ 0& -1\end{array}\right]$
BBf(6)	3	[9/2, 1/3]	$\left[\begin{array}{cc}-1& 2\\ 0& -1\end{array}\right]$
BBf(7)	4	[27/2, 1/3]	$\left[\begin{array}{cc}-1& 3\\ 0& -1\end{array}\right]$
BBf(8)	5	[81/2, 1/3]	$\left[\begin{array}{cc}-1& 4\\ 0& -1\end{array}\right]$
BBf(9)	6	[243/2, 1/3]	$\left[\begin{array}{cc}-1& 5\\ 0& -1\end{array}\right]$
BBf(10)	7	[729/2, 1/3]	$\left[\begin{array}{cc}-1& 6\\ 0& -1\end{array}\right]$
BBf(11)	10	[27/2, 25/3, 1/5]	$\left[\begin{array}{ccc}-1& 3& 0\\ 0& -1& 2\\ 0& 0& -1\end{array}\right]$
BBf(12)	13	[81/2, 25/3, 1/5]	$\left[\begin{array}{ccc}-1& 4& 0\\ 0& -1& 2\\ 0& 0& -1\end{array}\right]$
BBf(13)	17	[81/2, 125/3, 1/5]	$\left[\begin{array}{ccc}-1& 4& 0\\ 0& -1& 3\\ 0& 0& -1\end{array}\right]$
BBf(14)	21	[243/2, 125/3, 1/5]	$\left[\begin{array}{ccc}-1& 5& 0\\ 0& -1& 3\\ 0& 0& -1\end{array}\right]$
BBf(15)	28	[1/45, 4/5, 3/2, 25/3]	$\left[\begin{array}{ccc}0& -2& -1\\ 2& 0& -1\\ -1& 1& 0\\ 0& -1& 2\end{array}\right]$
BBf(16)	53	[1/45, 4/5, 3/2, 125/3]	$\left[\begin{array}{ccc}0& -2& -1\\ 2& 0& -1\\ -1& 1& 0\\ 0& -1& 3\end{array}\right]$
BBf(17)	107	[5/6, 49/2, 3/5, 40/7]	$\left[\begin{array}{cccc}-1& -1& 1& 0\\ -1& 0& 0& 2\\ 0& 1& -1& 0\\ 3& 0& 1& -1\end{array}\right]$
BBf(18)	211	[5/6, 49/2, 3/5, 80/7]	$\left[\begin{array}{cccc}-1& -1& 1& 0\\ -1& 0& 0& 2\\ 0& 1& -1& 0\\ 4& 0& 1& -1\end{array}\right]$
BBf(19)	370	[5/6, 49/2, 3/5, 160/7]	$\left[\begin{array}{cccc}-1& -1& 1& 0\\ -1& 0& 0& 2\\ 0& 1& -1& 0\\ 5& 0& 1& -1\end{array}\right]$
BBf(20)	746	[7/15, 22/3, 6/77, 5/2, 9/5]	$\left[\begin{array}{ccccc}& -1& -1& +1& \\ +1& -1& & & +1\\ +1& +1& & -1& -1\\ -1& & +1& & \\ & +2& -1& & \end{array}\right]$
BBf(21)	≥ 31,957,632	[7/15, 4/3, 27/14, 5/2, 9/5]	$\left[\begin{array}{cccc}0& -1& -1& 1\\ 2& -1& 0& 0\\ -1& 3& 0& -1\\ -1& 0& 1& 0\\ 0& 2& -1& 0\end{array}\right]$
BBf(22)	$>1.146\times 10^{62}$	[1/12, 9/10, 14/3, 11/2, 5/7, 3/11]	$\left[\begin{array}{ccccc}-2& -1& 0& 0& 0\\ -1& 2& -1& 0& 0\\ 1& -1& 0& 1& 0\\ -1& 0& 0& 0& 1\\ 0& 0& 1& -1& 0\\ 0& 1& 0& 0& -1\end{array}\right]$
BBf(23)	$>4.393\times 10^{124}$	[10/3, 9/14, 5/4, 121/2, 7/5, 3/11]	$\left[\begin{array}{ccccc}1& -1& 1& 0& 0\\ -1& 2& 0& -1& 0\\ -2& 0& 1& 0& 0\\ -1& 0& 0& 0& 2\\ 0& 0& -1& 1& 0\\ 0& 1& 0& 0& -1\end{array}\right]$
BBf(24)	$>9.000\times 10^{14448}$	[14/15, 1/6, 11/3, 441/2, 5/7, 15/11]	$\left[\begin{array}{ccccc}1& -1& -1& 1& 0\\ -1& -1& 0& 0& 0\\ 0& -1& 0& 0& 1\\ -1& 2& 0& 2& 0\\ 0& 0& 1& -1& 0\\ 0& 1& 1& 0& -1\end{array}\right]$

Cyclic Tree Rewriting System (CTBB(n))

	Runtime	Champions
CTBB(2)	5
CTBB(3)	> 38
CTBB(4)	≥ 672
CTBB(5)	≥ 2^2^2^2^182
CTBB(6)	> 2↑↑↑131
CTBB(7)	> 4↑↑↑↑(4↑↑↑3)

Cyclic Tag (BBCT(n))

BBCT(n)	Value	Champion
BBCT(1)	1	empty
BBCT(2)	2	0
BBCT(3)	3	00
BBCT(4)	4	000
BBCT(5)	7	010_
BBCT(6)	8	010_0
BBCT(7)	= 13	0110__
BBCT(8)	≥ 28	101_10_
BBCT(9)	≥ 717	1011_00_
BBCT(10)	≥ 1,626,862	1001_1_00
BBCT(11)	≥ 1,859,166	10_10010_0
BBCT(12)	≥ 6,328	0111__010_0
BBCT(13)	≥ 5,217,735	001110_1_0_0
BBCT(14)	≥ 154,171,565	01011__0_0100

Tiny Tag

n	Runtime	Champions
1	1	0
2	5	10
3	9	101
4	13	1001
5	15	10101
6	334	010111
7	404	1010111
8	670	11100101
9	12584	001101110
10	2180995	0100011110

Minsky Machines (MBB(n))

MBB(n)

Domain	Halting Time	Champion
MBB(1)	1	0+*
MBB(2)	3	0+B_0-B*
MBB(3)	5	0+B_0+C_0-C*
MBB(4)	10	0+B_1+C_0-BD_1-C*
MBB(5)	24	0-DB_0+C_1-ED_1+A_1-B*
MBB(6)	49	0+B_1-FC_1+D_0-CE_0+A_1-A*
MBB(7)	231	0+B_0+C_0+D_1-GE_1+F_0-EC_1-A*
MBB(8)	≥ 3,394	0+B_0+C_1-GD_1+E_0-DF_2-HG_2+A_2-D*
MBB(9)	> 4.493 × 1074	0+B_0+C_1-HD_0-EG_0-FI_1+D_2+H_0+A_2-B*
MBB(10)	> 10↑↑4.03	0+B_1-AC_2-ED_1+E_1+F_0-DG_2-JH_2+I_1-HE_2-A*
MBB(11)	> 10↑↑17.74	0-KB_1-IC_1+D_1+E_2-CF_0-AG_0+H_1-GI_2+J_2+B_0-B*

Register Sigma function (MΣ(n,r))

Domain	Sigma	Champion
MΣ(0)	0
MΣ(1)	1	0+*
MΣ(2)	2	0+B_0+*
MΣ(3)	3	0+B_0+C_0+*
MΣ(4)	4	0+B_0+C_0+D_0+*
MΣ(5)	6	0+B_0+C_0+D_1-*E_1+A
MΣ(6)	9	0+B_0+C_1+D_1+E_1+F_0-C*
MΣ(7)	34	0+B_0+C_0+D_1-GE_1+F_0-EC_1-A*
MΣ(8)	≥ 520	0+B_1+C_2-AD_2+E_2+F_0-DG_1-H*_1-EB
MΣ(9)	> 2.64 × 1073	0+B_0+C_1-HD_0-EG_0-FI_1+D_2+H_0+A_2-B*
MΣ(10)	> 10↑↑4.03	0+B_1-AC_2-ED_1+E_1+F_0-DG_2-JH_2+I_1-HE_2-A*
MΣ(11)	> 10↑↑17.74	0-KB_1-IC_1+D_1+E_2-CF_0-AG_0+H_1-GI_2+J_2+B_0-B*

Pebble Automaton (peBBle(n))

n	peBBle(n)	Champion
peBBle(1)	0	00
peBBle(2)	1	00_01
peBBle(3)	3	00_01_20
peBBle(4)	6	00_01_20_03
peBBle(5)	11	00_11_03_21_04
peBBle(6)	17	00_11_03_21_40_15
peBBle(7)	28	00_11_03_21_10_33_61
peBBle(8)	63	00_11_03_21_50_30_24_70
peBBle(9)	63577	00_02_01_40_14_12_00_52_81
peBBle(10)	5778	00_02_01_40_14_12_00_17_63_18
peBBle(11)	≥ 810,626,821	00_00_30_40_12_51_07_20_41_12_19

PLUSMINUS

Initial string size	"steps"	Champion
1	1	+
2	3	-+
3	4	-++
4	7	-+++
5	15	++++-
6	18	+++-++
7	20	++++---
8	32	--++++++
9	44	++++-+--+
10	196	+++++-+-+-
11	913	+++++-+--+-
12	5940	+++-++++++-+
13	728	+-++++++--++-
14	608	++++-++++++---
15	2582	-+-++++++---+++
16	31441	+++++-++++-+-++-

Wang Tiles (BB_WT(n))

n	BBWT(n)	Champion	Image	Reference
BBWT(1)	1	[1,0,0,0]
BBWT(2)	2	[1,0,2,0] [2,0,3,0]
BBWT(3)	3	[1,0,2,0] [2,0,3,0] [3,0,4,0]
BBWT(4)	4	[1,0,2,0] [2,0,3,0] [3,0,4,0] [4,0,5,0]
BBWT(5)	6	[1,0,2,0] [2,0,3,0] [3,0,4,0] [4,6,1,5] [4,5,2,6]
BBWT(6)	8	[1,0,2,0] [2,0,3,0] [3,0,4,0] [4,0,5,0] [5,7,1,6] [5,6,2,7]
BBWT(7)	16	[4,0,3,0] [3,0,4,1] [3,1,3,2] [5,2,4,0] [4,1,4,2] [4,1,3,1] [3,2,5,0]
BBWT(8)	≥ 17	[4,0,3,0] [3,0,4,1] [3,1,3,2] [5,2,4,0] [4,1,4,2] [4,1,3,1] [3,2,5,0] [0,0,3,1]
BBWT(9)	≥ 17	[1,0,2,0] [2,0,3,0] [3,0,4,0] [4,0,5,0] [5,0,6,0] [6,0,7,0] [7,9,1,8] [7,8,2,9] [6,8,3,9]
BBWT(10)	≥ 212

Branching Beaver (BrB(n))

Maximum Steps Function (BrB(n))

Domain	Steps	Champions
BrB(1)	3	1RA1RZ
BrB(2)	10	1RA0GB_1GA1RZ
BrB(3)	≥ 52	1RB0GB_0GC1RZ_1GC0RA
BrB(4)	≥ 4636	1RA0GB_1RC1RD_1GA0GC_1RZ0GA
BrB(2,3)	≥ 68	1RA2GA0BB_1BA2BA1RZ1RA2GA0BB_2BA1RZ1BA
BrB(2,4)	≥ 332,372	1RB2RB1GB1RZ_2GB3GA3RA1RA

Maximum Space Function (BrB_space(n))

Domain	Max Space	Champions
BrBspace(1)	2	1RA1RZ
BrBspace(2)	4	1RA0GB_1GA1RZ (and 10 others)
BrBspace(3)	≥ 22	1RB1RZ_0GC0BB_1GA0RA
BrBspace(4)	≥ 384	1RB0BB_0RC1RZ_0GA1GD_1RC0RA
BrBspace(2,3)	≥ 20	1RA2GA0BB_1BA2BA1RZ1RA2GA0BB_2BA1RZ1BA
BrBspace(2,4)	≥ 5996	1RB2GA3BA0RA_1GB2BB1RA1RZ

Turmites

Terminating Turmites (TT(n,k), 1D Turmites)

Where n is the amount of states and k is the amount of symbols.

Maximum steps for TT(n,k)

Domain	Runtime	Champions
TT(1)	3	1TA1PZ
TT(2)	≥ 13	1TB---_1PA0PB
TT(3)	≥ 82	1PB0PA_1TA0PC_1PA---
TT(4)	≥ 48,186	1TB1PA_1PC0PA_1TA0PD_---1TA
TT(1,3)	≥ 5	1TA2PA1PZ
TT(2,3)	≥ 223	1TB0PA2PA_2PA---1PA
TT(3,3)	> $2.27\times 10^{248}$	1PB0TC1PA_2PC1PZ2PA_2TC0PA2PC
TT(1,4)	≥ 9	1TA2PA3PA1PZ
TT(2,4)	> 3.467*1015	1TA2PB3TB---_3TA1PB1TA1PA

Maximum score for TT(n,k)

Domain	Score	Champion
TT(3,3)	≥ 32,778	1PB2PA0PC_2TB1PC2PB_2PB1PZ0PA

2D Turmites (turNing machines)

Domain	Runtime	Champion
TT2D(1)	5	1RA1PZ
TT2D(2)	≥ 121	1LA0LB_1PZ1RA
TT2D(3)	≥ 21,790	1RB1PA_1RB1RC_1PZ1PA
TT2D(4)	≥ 287,251	1PB0TD_0RA0PC_1PZ0TB_1PA0PA
TT2D(1,3)	≥ 9	1RA2RA1PZ
TT2D(2,3)	≥ 59,348,218	1RB2TB2PZ_1RA1PB1TB

Doodle Function (doodle(c,n))

doodle(1,n) = 1 and doodle(2,n) = n. Also note that doodle(c) = doodle(c,2).

2 Symbols:	Runtime	Champions
doodle(3,2)	≥ 487

Bug Function (Bug Game)

Bug(2,2) = 2

####
#S-#
#.F#
####

Bug(3,3) = 8

#####
#S..#
#.#.#
#.#F#
#####

Bug(4,4) = 20

######
#S...#
#..###
#....#
#..#F#
######

Bug(5,5) = 42

#######
#S...##
#.....#
#.....#
#.#.###
#.#..F#
#######

Bug(6,6) = 96

########
#S.....#
#.###.##
#.#...##
#.#....#
#..#.###
#..#..F#
########

Bug(7,7) = 218

#########
#S.###..#
#......##
#.#.##..#
#..#...##
#..#....#
#...#.###
#..#-..F#
#########

Bug(8,8) = 506

##########
#S.#.....#
#.#..##.##
#.#.##..##
#....##..#
#.#.#...##
#..##....#
#....#.###
#....#..F#
##########