Googolplex

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A googolplex is $\scriptstyle 10^{10^{100}}$ , or 10 to the power of a googol. We don't have enough room here to write all the base 10 digits of a googolplex, which is $\scriptstyle 10^{100}+1$ , more than $\scriptstyle {10^{13}}$ times the estimated number of particles in the Universe.