title: What is the difference for x.509 certificate serial number format in brackets and not in brackets.
body: <p>I have generated a certificate that has the serial number in such a format
  <em>0eaa20f53cacdcaa40fbde51ab50c7d1</em></p>
  
  <p>I have also seen a certificate with this format. I would like to generate one like this.
  <em>10978342379280287625 (0x985ae83a6b9e477f)</em></p>
  
  <p>How can I do this? Whats the difference?</p>