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The -plex suffix, when applied to argument $$n$$, represents $$10^n$$ according to Conway and Guy. This is based on googolplex, which is $$10$$$$^{\text{googol}}$$.[1]

Aarex Tiaokhiao coined the alternate term -noogol for this prefix.

$$10^{10^{n}}$$ may be notated -plexplex or, more commonly, -duplex. Similarly, $$10^{10^{10^{n}}}$$ is -triplex. In general, for a Latin prefix n, -n-plex means n copies of the -plex suffix.

$$10^{-n}$$, conversely, is called n-minex (wordplay on plus:plex::minus:minex), and 10-googol is called googolminex.[2] Sbiis Saibian used -minutia suffix to some of his number (for example gogol-minutia = 10-50).

In the works of Jonathan Bowers, -plex has a more general and less formal definition: if a number n is $$f(10, 100)$$ where $$f$$ is some googological function, then n-plex is defined as $$f(10, n)$$. For example, giggol = $$10\uparrow\uparrow 100$$, and giggolplex is not $$10^{\text{giggol}}$$ but is $$10\uparrow\uparrow\text{giggol}$$. There are some exceptions to this rule, for instance golapulusplex. Sbiis Saibian circumvents this subjective definition by defining new prefixes such as -dex and -threx. For his googolisms in Cascading-E and higher components of his system, he uses the word grand analogous to Bowers' usage of -plex (for example, grand tethrathoth).

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