The primipenol is equal to s(3,2,6,2) in strong array notation.[1] It can be represented in chained arrow notation as \(3\rightarrow3\rightarrow2\rightarrow6\).


The name of this number is based on the prefix "penta-" and the number "primitol".


Notation Approximation
BEAF \(\{3,27,4,2\}\)
Hyper-E notation \(E2\#\#27\#26\#26\#26\#26\)
Chained arrow notation \(3\rightarrow3\rightarrow2\rightarrow6\) (exact)
Hyperfactorial array notation \(26![5]\)
Fast-growing hierarchy \(f_{\omega+4}(26)\)
Hardy hierarchy \(H_{\omega^{\omega+4}}(26)\)
Slow-growing hierarchy \(g_{\varphi(1,3,0)}(27)\)


  1. Numbers from linear array notation | Steps Toward Infinity!

See alsoEdit

Hyp cos' linear strong array notation numbers | exAN numbers
3-entry series
Tribo group: tribo · tetbo · pentbo · hexabo
Trientri group: trientri · tettro · pentro · hextro
Trientet group: triteto · trientet · penteto · hexteto
Trienpent group: tripeno · tetpeno · trienpent · hexpeno
Trienhex group: trihexo · tethexo · penhexo · trienhex

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