Quinquagintoogol

Not to be confused with Quinquadragintoogol or Quinquinquagintoogol.

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Quinquagintoogol is equal to \(\{\underbrace{10, 10, 10, 10, 10, \dots , 10, 10, 10, 10, 10}_{50\text{ tens}}, 100\}\). This term was coined by YouTuber Douglas Shamlin Jr.

Etymology

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

Approximations

Notation	Approximation
Extended Hyper-E notation	\(E10\#^{51}101\)
Bird's array notation	\(\{\underbrace{10, 10, 10, 10, 10, \dots , 10, 10, 10, 10, 10}_{50\text{ tens}}, 100\}\) (exact)
Fast-growing hierarchy	\(f_{\omega^{49}}(100)\)
Hardy hierarchy	\(H_{\omega^{(\omega^{49})}}(100)\)