Googolstackstackstackstack is equal to \(10\uparrow\uparrow \text{googolstackstackstack}\) or \(10\uparrow\uparrow 10\uparrow\uparrow 10\uparrow\uparrow 10^{100}\).[1]
Etymology
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The name of this number can be separated into 5 parts, "googol" and 4 "-stack"s, where "n-stack" means \(10\uparrow\uparrow n\), so 4 "-stack"s means the operation applying 4 times.
Sources
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