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Septuagintoogol is equal to \(\{\underbrace{10, 10, 10, 10, 10, \dots , 10, 10, 10, 10, 10}_{70\text{ tens}}, 100\}\). This term was coined by YouTuber Douglas Shamlin Jr.[1]

Etymology[]

The name of the number is based on the numbers "septuagintillion" and "googol".

Approximations[]

Notation Approximation
Extended Hyper-E notation \(E10\#^{71}101\)
Bird's array notation \(\{\underbrace{10, 10, 10, 10, 10, \dots , 10, 10, 10, 10, 10}_{70\text{ tens}}, 100\}\) (exact)
Fast-growing hierarchy \(f_{\omega^{69}}(100)\)
Hardy hierarchy \(H_{\omega^{(\omega^{69})}}(100)\)

Sources[]

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