Quelle  tikz_primesandtwinsamongodd_dark_gray.tex

%tikz
\begin{tikzpicture}[every node/.style={draw,scale=1pt,
minimum width=30pt,inner sep=3pt,
line width=0pt,draw=black}]
\matrix[row sep=2pt,column sep=2pt]
{\node[fill=black!60]{861};&
\node[fill=black!80]{863};&
\node[]{865};&
\node[fill=black!60]{867};&
\node[]{869};&
\node[]{871};&
\node[fill=black!60]{873};&
\node[]{875};&
\node[fill=black!80]{877};&
\node[fill=black!60]{879};&
\node[left color=black!80,right color=black!70]{881};&
\node[left color=black!80,right color=black!70]{883};&
\node[fill=black!60]{885};&
\node[fill=black!80]{887};&
\node[]{889};\\
\node[fill=black!60]{831};&
\node[]{833};&
\node[]{835};&
\node[fill=black!60]{837};&
\node[fill=black!80]{839};&
\node[]{841};&
\node[fill=black!60]{843};&
\node[]{845};&
\node[]{847};&
\node[fill=black!60]{849};&
\node[]{851};&
\node[fill=black!80]{853};&
\node[fill=black!60]{855};&
\node[left color=black!80,right color=black!70]{857};&
\node[left color=black!80,right color=black!70]{859};\\
\node[fill=black!60]{801};&
\node[]{803};&
\node[]{805};&
\node[fill=black!60]{807};&
\node[left color=black!80,right color=black!70]{809};&
\node[left color=black!80,right color=black!70]{811};&
\node[fill=black!60]{813};&
\node[]{815};&
\node[]{817};&
\node[fill=black!60]{819};&
\node[left color=black!80,right color=black!70]{821};&
\node[left color=black!80,right color=black!70]{823};&
\node[fill=black!60]{825};&
\node[left color=black!80,right color=black!70]{827};&
\node[left color=black!80,right color=black!70]{829};\\
};
\end{tikzpicture}