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Gorgegoldex is equal to E100#(E100#100#100#100#100) using Hyper-E notation.[1] The term was coined by Sbiis Saibian. This number belongs to the gorgegol regiment.

Approximations in other notations[]

Notation Approximation
Up-arrow notation \(100 ↑↑ 100 \uparrow^5 101\)
Chained arrow notation \(100 → (100 → 101 → 5) → 2\)
Strong array notation \(s(100,s(100,101,5),2)\)
BEAF \(\{100,\{100,101,5\},2\}\)
Fast-growing hierarchy \(f_3(f_6(100))\)
Hardy hierarchy \(H_{\omega^6}(100)\)
Slow-growing hierarchy \(g_{\varepsilon_{\varphi(4,0)+1}}(100)\)

Sources[]