serial_test.tex

% !TeX TS-program = lualatex
\documentclass[a4paper, 10pt]{article}
\usepackage[margin=1cm]{geometry}
\usepackage{multicol}
\usepackage{forloop}
\usepackage{fmtcount}
\usepackage[first=1, last=2147483647, seed=15, counter=serialnumber]{lcg}

\newcounter{numpages}
\begin{document}
	\pagestyle{empty}
	\begin{multicols}{8}
		\noindent
		% 10408 ~= 20 A4 pages full of serial numbers
		% use Excel and conditional formatting to
		% check for duplicates ... so far: none found!
		\forloop{numpages}{1}{\value{numpages} < 10408}{
		 \rand
		 \decimal{serialnumber}\newline
		}
	\end{multicols}
\end{document}