\begin{align} \textbf{Q: } & \text{ What is the prime factorization of } 2^{67}-1\text{?} \\[4pt] \textbf{A: } & ~193{,}707{,}721 \times 761{,}838{,}257{,}287. \end{align} Everybody knows that Frank Nelson Cole did this by hand. (Except those who don't.)