Terminagol

The terminagol is equal to \(10^{10^{40}}\). This term was coined by YouTuber Metsuka The Cute Princess 2007.Metsuka The Cute Princess 2007, Absolutely Ultimate​ List of Large Numbers (Part 3) | That Took Me Thirty Hours To Make This Accessed 2024-05-11. It is 1040+1 digits long.
Writing down the full decimal expansion would take 10 decillion (1034) books of 400 pages each, with 2,500 digits on each page (except for the first, which would have 2,501).
== Names in -illion systems ==
In Conway-Wechsler system,Conway and Guy (1995) "The book of Numbers" Copernicus. pp.14-15. terminagol is expressed in short scale as follows by using Fish's result.Fish Illion name of 10^10^x in Conway-Wechsler system 2021-12-25
According to Landon Curt Noll's The English name of a number, terminagol is also known as:
==Approximations==
Notation 	Approximation
Scientific notation	\(1\times 10^{10^{40}}\) (exact)
Arrow notation 	\(10 \uparrow 10 \uparrow 40\) (exact)
==Sources==
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