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The grand tethratope is equal to E100#^^#^#100#2 = E100#^^###...(tethratope #'s)...####100 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 "tethratope".

Approximations in other notations[]

Notation Approximation
BEAF \(\{100,3,2 (\{X,X,X\}) 2\}\) (weak bound)

\(\{100,3,2 (X \uparrow \uparrow X \uparrow X) 2\}\) (strong bound)[2]

Fast-growing hierarchy \(f_{\varphi(\omega,0)}(f_{\varphi({100},0)}(99))\)
Hardy hierarchy \(H_{\varphi(\omega,0)*2}(100)\)

Sources[]

  1. Saibian, Sbiis. 4.3.9 - Extended Cascading-E Numbers Part III. Retrieved 2017-01-10.
  2. Using particular notation \(\{a,b (X \uparrow\uparrow X) 2\}\) for \(X \uparrow\uparrow b\ \&\ a\).