title: How to factorize a big integer
body: <p>I am trying to factorize a big integer with the following code:</p>
  
  <pre><code>library(gmp)
  as.bigz(factorize( 113423713055421844361000443))
  Big Integer ('bigz') object of length 38:
  #  [1] 2       2       2       2       2       2       2       2       2       2       2
  # [12] 2       2       2       2       2       2       2       2       2       2       2
  # [23] 2       2       2       2       2       2       2       2       2       2       2
  # [34] 2       3       647     1134247 2998823
  </code></pre>
  
  <p>This is clearly not the correct factorization, because my integer is odd but <code>factorize</code> is returning 2 as a factor. What is the problem?</p>