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The grand tethrennon is equal to E100#^^#^(9)100#2 = E100#^^#########100#2 in Extended Cascading-E Notation.[1] The term was coined by Sbiis Saibian.

Etymology

The name of this number is based on the prefix "grand" and the number "tethrennon".

Approximations in other notations

Notation Approximation
Bird's array notation \(\{100,3,2 [1 [2 \neg 2] 2] 2\}\)
Fast-growing hierarchy \(f_{\varphi(9,0)}(f_\varphi(9,0)(99))\)
Hardy hierarchy \(H_{\varphi(9,0)*2}(100)\)

Sources

  1. Saibian, Sbiis. 4.3.3 - Forging Extended Cascading-E Numbers Part I. Retrieved May 6, 2014.
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