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The googolnovemduex is equal to s(10,googoloctoduex,2) using strong array notation.[1] The term was coined by Aarex Tiaokhiao.

Approximations in other notations[]

Notation Approximation
Up-arrow notation \(10^{100} \uparrow\uparrow\uparrow 10\)
Chained arrow notation \(10^{100} \rightarrow 10 \rightarrow 3 \)
BEAF \(\{\{10,100\},10,3\}\)
Hyper-E notation \(E100\#1\#10\)
Hyperfactorial array notation \(12!2\)
Fast-growing hierarchy \(f_4(9)\)
Hardy hierarchy \(H_{\omega^39+\omega^2}(324)\)
Slow-growing hierarchy \(g_{\zeta_0}(10)\)

Sources[]