The medohectillion is equal to \(10^{3\times 10^{603}+3}\).[1][2] It is defined using Sbiis Saibian's generalization of Jonathan Bowers' -illion system. It is the ducentillionth -illion.


Notation Lower bound Upper bound
Arrow notation \(1000\uparrow(1+10\uparrow603)\)
Down-arrow notation \(1000\downarrow\downarrow202\) \(87\downarrow\downarrow312\)
Steinhaus-Moser Notation 250[3][3] 251[3][3]
Copy notation 2[2[604]] 3[3[604]]
H* function H(H(200))
Taro's multivariable Ackermann function A(3,A(3,2003)) A(3,A(3,2004))
Pound-Star Notation #*((1))*((235))*11 #*((1))*((236))*11
BEAF {1000,1+{10,603}}
Hyper-E notation E(3+3E603)
Bashicu matrix system (0)(1)[44] (0)(1)[45]
Hyperfactorial array notation (294!)! (295!)!
Fast-growing hierarchy \(f_2(f_2(1995))\) \(f_2(f_2(1996))\)
Hardy hierarchy \(H_{\omega^22}(1995)\) \(H_{\omega^22}(1996)\)
Slow-growing hierarchy \(g_{\omega^{\omega^{\omega^26+3}3+3}}(10)\)


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