title: Rstudio and R terminal give different outputs
body: <p>In Rstudio (using R 3.1.1) when I run this,</p>
  
  <pre><code>length(unique(sort(c(outer(2:100,2:100,"^")))))
  # 9220 
  </code></pre>
  
  <p>In R 3.1.1 when I run this,</p>
  
  <pre><code>length(unique(sort(c(outer(2:100,2:100,"^")))))
  # 9183
  </code></pre>
  
  <p>(the correct output is 9183)</p>
  
  <p>I can't figure out why... help is greatly appreciated</p>