\nonstopmode
\documentstyle[12pt]{article}
\begin{document}

\begin{minipage}{12cm}
  \begin{center}
    \Large 
    {\Large The Oldest, Hardest and Most Important\\
    Unsolved Problem in Computer Science:}\\[3mm]
    \framebox{
      \begin{minipage}{10cm}
        \hrule height0pt
        \vskip 1.2cm

        \begin{center}
          \Huge
          ${\rm P} = {\rm NP}?$
        \end{center}

        \vskip 0.7cm
        \hrule height0pt
      \end{minipage}
    }\\[3mm]
    {\small (Printer is Not Printing?)}
  \end{center}
\end{minipage}

\end{document}
