Green's machines: Difference between revisions

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List of Milton Green's Machines
 
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|-
|4
|4
|{{TM|1LB1RZ_0LC1LC_0LD0LC_1RD1RA}}
|{{TM|1LB1RZ_0LC1LC_0LD0LC_1RD1RA|halt}}
|7
|7
|-
|-
|5
|5
|{{TM|1LD1LB_1LZ1LA_0LB1LD_0LE0LD_1RE1RC}}
|{{TM|1LD1LB_1LZ1LA_0LB1LD_0LE0LD_1RE1RC|halt}}
|13
|13
|-
|-
|6
|6
|{{TM|1LB1RZ_0LC1LC_0LD0LC_1LE1RA_0LF0LE_1RF1RD}}
|{{TM|1LB1RZ_0LC1LC_0LD0LC_1LE1RA_0LF0LE_1RF1RD|halt}}
|35
|35
|-
|-
|7
|7
|{{TM|1LD1LB_1LZ1LA_0LB1LD_0LE0LD_1LF1RC_0LG0LF_1RG1RE}}
|{{TM|1LD1LB_1LZ1LA_0LB1LD_0LE0LD_1LF1RC_0LG0LF_1RG1RE|halt}}
|22,961
|22,961
|-
|-
|8
|8
|{{TM|1LB1RZ_0LC1LC_0LD0LC_1LE1RA_0LF0LE_1LG1RD_0LH0LG_1RH1RF}}
|{{TM|1LB1RZ_0LC1LC_0LD0LC_1LE1RA_0LF0LE_1LG1RD_0LH0LG_1RH1RF|halt}}
|<math> \frac{7 \cdot 3^{93} - 3}{2} </math>
|<math> \frac{7 \cdot 3^{93} - 3}{2} </math>
|-
|-
|9
|9
|{{TM|1LD1LB_1LZ1LA_0LB1LD_0LE0LD_1LF1RC_0LG0LF_1LH1RE_0LI0LH_1RI1RG}}
|{{TM|1LD1LB_1LZ1LA_0LB1LD_0LE0LD_1LF1RC_0LG0LF_1LH1RE_0LI0LH_1RI1RG|halt}}
|<math> > 3 \uparrow\uparrow 31 </math>
|<math> > 3 \uparrow\uparrow 31 </math>
|-
|-
|10
|10
|{{TM|1LB1RZ_0LC1LC_0LD0LC_1LE1RA_0LF0LE_1LG1RD_0LH0LG_1LI1RF_0LJ0LI_1RJ1RH}}
|{{TM|1LB1RZ_0LC1LC_0LD0LC_1LE1RA_0LF0LE_1LG1RD_0LH0LG_1LI1RF_0LJ0LI_1RJ1RH|halt}}
|<math> > 3 \uparrow\uparrow 3 \uparrow\uparrow 4 </math>
|<math> > 3 \uparrow\uparrow 3 \uparrow\uparrow 4 </math>
|-
|-
|11
|11
|{{TM|1LD1LB_1LZ1LA_0LB1LD_0LE0LD_1LF1RC_0LG0LF_1LH1RE_0LI0LH_1LJ1RG_0LK0LJ_1RK1RI}}
|{{TM|1LD1LB_1LZ1LA_0LB1LD_0LE0LD_1LF1RC_0LG0LF_1LH1RE_0LI0LH_1LJ1RG_0LK0LJ_1RK1RI|halt}}
|<math> > 3 \uparrow\uparrow\uparrow 3 \uparrow\uparrow\uparrow 2 </math>
|<math> > 3 \uparrow\uparrow\uparrow 3 \uparrow\uparrow\uparrow 2 </math>
|-
|-
|12
|12
|{{TM|1LB1RZ_0LC1LC_0LD0LC_1LE1RA_0LF0LE_1LG1RD_0LH0LG_1LI1RF_0LJ0LI_1LK1RH_0LL0LK_1RL1RJ}}
|{{TM|1LB1RZ_0LC1LC_0LD0LC_1LE1RA_0LF0LE_1LG1RD_0LH0LG_1LI1RF_0LJ0LI_1LK1RH_0LL0LK_1RL1RJ|halt}}
|<math> > 3 \uparrow\uparrow\uparrow 3 \uparrow\uparrow\uparrow 4 </math>
|<math> > 3 \uparrow\uparrow\uparrow 3 \uparrow\uparrow\uparrow 4 </math>
|-
|-
|13
|13
|{{TM|1LD1LB_1LZ1LA_0LB1LD_0LE0LD_1LF1RC_0LG0LF_1LH1RE_0LI0LH_1LJ1RG_0LK0LJ_1LL1RI_0LM0LL_1RM1RK}}
|{{TM|1LD1LB_1LZ1LA_0LB1LD_0LE0LD_1LF1RC_0LG0LF_1LH1RE_0LI0LH_1LJ1RG_0LK0LJ_1LL1RI_0LM0LL_1RM1RK|halt}}
|<math> > 3 \uparrow\uparrow\uparrow\uparrow 3 \uparrow\uparrow\uparrow\uparrow 2 </math>
|<math> > 3 \uparrow\uparrow\uparrow\uparrow 3 \uparrow\uparrow\uparrow\uparrow 2 </math>
|-
|-
|14
|14
|{{TM|1LB1RZ_0LC1LC_0LD0LC_1LE1RA_0LF0LE_1LG1RD_0LH0LG_1LI1RF_0LJ0LI_1LK1RH_0LL0LK_1LM1RJ_0LN0LM_1RN1RL}}
|{{TM|1LB1RZ_0LC1LC_0LD0LC_1LE1RA_0LF0LE_1LG1RD_0LH0LG_1LI1RF_0LJ0LI_1LK1RH_0LL0LK_1LM1RJ_0LN0LM_1RN1RL|halt}}
|<math> > 3 \uparrow\uparrow\uparrow\uparrow 3 \uparrow\uparrow\uparrow\uparrow 4 </math>
|<math> > 3 \uparrow\uparrow\uparrow\uparrow 3 \uparrow\uparrow\uparrow\uparrow 4 </math>
|-
|-
|15
|15
|{{TM|1LD1LB_1LZ1LA_0LB1LD_0LE0LD_1LF1RC_0LG0LF_1LH1RE_0LI0LH_1LJ1RG_0LK0LJ_1LL1RI_0LM0LL_1LN1RK_0LO0LN_1RO1RM}}
|{{TM|1LD1LB_1LZ1LA_0LB1LD_0LE0LD_1LF1RC_0LG0LF_1LH1RE_0LI0LH_1LJ1RG_0LK0LJ_1LL1RI_0LM0LL_1LN1RK_0LO0LN_1RO1RM|halt}}
|<math> > 3 \uparrow\uparrow\uparrow\uparrow\uparrow 3 \uparrow\uparrow\uparrow\uparrow\uparrow 2 </math>
|<math> > 3 \uparrow\uparrow\uparrow\uparrow\uparrow 3 \uparrow\uparrow\uparrow\uparrow\uparrow 2 </math>
|
|

Revision as of 13:31, 13 August 2024

In 1964, Milton W. Green hand-crafted a family of fast-growing Turing Machines with n-states, 2-symbols for all n≥4.[1] This family grows roughly as fast as the Ackermann functionBB2n≈3↑n−23

Machines

# States TM Sigma Score
4 1LB1RZ_0LC1LC_0LD0LC_1RD1RA (bbch) 7
5 1LD1LB_1LZ1LA_0LB1LD_0LE0LD_1RE1RC (bbch) 13
6 1LB1RZ_0LC1LC_0LD0LC_1LE1RA_0LF0LE_1RF1RD (bbch) 35
7 1LD1LB_1LZ1LA_0LB1LD_0LE0LD_1LF1RC_0LG0LF_1RG1RE (bbch) 22,961
8 1LB1RZ_0LC1LC_0LD0LC_1LE1RA_0LF0LE_1LG1RD_0LH0LG_1RH1RF (bbch) 7⋅393−32
9 1LD1LB_1LZ1LA_0LB1LD_0LE0LD_1LF1RC_0LG0LF_1LH1RE_0LI0LH_1RI1RG (bbch) >3↑↑31
10 1LB1RZ_0LC1LC_0LD0LC_1LE1RA_0LF0LE_1LG1RD_0LH0LG_1LI1RF_0LJ0LI_1RJ1RH (bbch) >3↑↑3↑↑4
11 1LD1LB_1LZ1LA_0LB1LD_0LE0LD_1LF1RC_0LG0LF_1LH1RE_0LI0LH_1LJ1RG_0LK0LJ_1RK1RI (bbch) >3↑↑↑3↑↑↑2
12 1LB1RZ_0LC1LC_0LD0LC_1LE1RA_0LF0LE_1LG1RD_0LH0LG_1LI1RF_0LJ0LI_1LK1RH_0LL0LK_1RL1RJ (bbch) >3↑↑↑3↑↑↑4
13 1LD1LB_1LZ1LA_0LB1LD_0LE0LD_1LF1RC_0LG0LF_1LH1RE_0LI0LH_1LJ1RG_0LK0LJ_1LL1RI_0LM0LL_1RM1RK (bbch) >3↑↑↑↑3↑↑↑↑2
14 1LB1RZ_0LC1LC_0LD0LC_1LE1RA_0LF0LE_1LG1RD_0LH0LG_1LI1RF_0LJ0LI_1LK1RH_0LL0LK_1LM1RJ_0LN0LM_1RN1RL (bbch) >3↑↑↑↑3↑↑↑↑4
15 1LD1LB_1LZ1LA_0LB1LD_0LE0LD_1LF1RC_0LG0LF_1LH1RE_0LI0LH_1LJ1RG_0LK0LJ_1LL1RI_0LM0LL_1LN1RK_0LO0LN_1RO1RM (bbch) >3↑↑↑↑↑3↑↑↑↑↑2

External Links

References

  1. ↑ Milton W. Green. “A Lower Bound on Rado’s Sigma Function for Binary Turing Machines”, Proceedings of the IEEE Fifth Annual Symposium on Switching Circuits Theory and Logical Design, 1964, pages 91–94, https://doi.org/10.1109/SWCT.1964.3