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\title{There Is No Largest Prime Number}
\date[ISPN ’80]{27th International Symposium of Prime Numbers}
\author[Euclid]{Euclid of Alexandria \texttt{euclid@alexandria.edu}\inst{1}}
\institute{\inst{1} University of Alexandria}

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  \frametitle{There Is No Largest Prime Number}
  \framesubtitle{The proof uses \textit{reductio ad absurdum}.}
  \begin{theorem}
    There is no largest prime number.
  \end{theorem}
  \begin{enumerate}
  \item&lt;1-| alert@1&gt; Suppose $p$ were the largest prime number.
  \item&lt;2-&gt; Let $q$ be the product of the first $p$ numbers.
  \item&lt;3-&gt; Then $q+1$ is not divisible by any of them.
  \item&lt;1-&gt; But $q + 1$ is greater than $1$, thus divisible by some prime
    number not in the first $p$ numbers.
  \end{enumerate}
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