title: What is the precise meaning of arbitrary precision?
body: <p>This might be a very simple question for some but I would like to know the meaning of <em>arbitrary precision</em> which appears in the first line in JavaDoc of <a href="http://grepcode.com/file/repository.grepcode.com/java/root/jdk/openjdk/6-b14/java/math/BigInteger.java#BigInteger.%3Cinit%3E%28long%29" rel="noreferrer">BigInteger</a> :</p>
  
  <blockquote>
    <p>Immutable <em>arbitrary-precision</em> integers .</p>
  </blockquote>