LaTeX source for my "Fermat's little theorem"-Tattoo (yes, it ain't generalized - on purpose)

tattoo.tex

%% PoC* by:   Karo Kawalle
%% PoC* URL:  https://twitter.com/a_z_e_t/status/898274928515874816
%% Author:    Aaron Zauner <azet@azet.org> [Theorem: Pierre de Fermat]
%% Date:      17.08.2017 [18.10.1640]
%% License:   CC0 1.0 Universal [Public Domain Dedication]
%% Depends:   `texlive-full latexmk` [on deb/apt based distros]
%% Build:     `latexmk -pdf tattoo.tex`
%% * PoC = "Proof of Concept" (abbreviation) [i.e. implementation]
\documentclass[a4paper]{letter}
\usepackage{quattrocento, microtype, mathtools}
\begin{document}
  \centering \huge $a^{p-1} \equiv 1 \pmod{p}.$
\end{document}
%EOF