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Ogdagolplex (also called ogdagologdex) is equal to s(10,ogdagol,8) using strong array notation.[1] The term was coined by Aarex Tiaokhiao.

ARsygo coined gocgol for this number.[2]

Approximations in other notations[]

Notation Approximation
Up-arrow notation \(10 \uparrow^8 10 \uparrow^8 100\) (exact)
Chained arrow notation \(10 \rightarrow (10 \rightarrow 100 \rightarrow 8) \rightarrow 8 \) (exact)
Hyper-E notation \(\textrm E1\#1\#1\#1\#1\#1\#1\#100\#2\) (exact)
Hyperfactorial array notation \((102!7)!7\)
BEAF \(\{10,\{10,100,8\},8\}\) (exact)
Fast-growing hierarchy \(f_9(f_9(100))\)
Hardy hierarchy \(H_{\omega^92}(100)\)
Slow-growing hierarchy \(g_{\varphi(7,\varphi(7,0))}(100)\)

Sources[]

  1. Part 1 (LAN) - Aarex Googology (archived, accessed 2021-05-15)
  2. AR Googol - Numbers from BEAF. Retrieved 2022-12-13.
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