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Tetrahectal is equal to \(\{100,100,100,100\}\) in BEAF.[1] The term was coined by ARsygo.

Approximations[]

Notation Approximation
Bird's array notation \(\{100,100,100,100\}\) (exact)
DeepLineMadom's Array Notation \(100[101,100]100\)
Hyper-E notation \(\text{E}[100]100\#\#\#101\)
Hyperfactorial array notation \(100![100,99]=100![1,100]=100![1,1,2]\)
Strong array notation \(\text{s}(100,100,101,100)\)
X-Sequence Hyper-Exponential Notation \(100\{X^2\}100\) (exact)
Fast-growing hierarchy \(f_{\omega^2}(100)\)
Hardy hierarchy \(H_{\omega^{\omega^2}}(100)\)
Slow-growing hierarchy \(g_{\varphi(99,99,0)}(10)\)

Sources[]

  1. AR Googol - Numbers from BEAF. Retrieved 2023-06-22.
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