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The pentastaculated-tethritertethracross is equal to E100(#^^##)^^##5 using Extended Cascading-E Notation.[1] The term was coined by Sbiis Saibian.

Approximations in other notations[]

Notation Approximation
BEAF (X^^^X)^^^5 & 100
Bird's array notation ???
Fast-growing hierarchy \(f_{\zeta_1[5]}(100)\)
Hardy hierarchy \(H_{\zeta_1[5]}(101)\)
Slow-growing hierarchy ???

Sources[]

  1. Saibian, Sbiis. 4.3.7 Extended Cascading-E Numbers Part IOne to Infinity. Retrieved 2017-03-04.
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