There's a page for each individual badge (eg. The Teacher Badge), which shows the description & the list of people who recently earned it. Given that the URL is based off the badge's Id, why are there some badges that appear not to exist (eg. 16 and 29)? Were they removed? Have they not been discovered yet?

  • Cool question... Jun 29, 2009 at 1:03
  • 4
    I think one of them was the hacker badge. Jun 29, 2009 at 2:41

3 Answers 3


I'll give you a hint. So far, 16 and 29 are the only missing numbers in the sequence. 29 is a badge (secret) and 16 is just a gap in the identity field for that table, which as gnovice points out was the number for the original "Specialist" badge.


Number 16 was the original "Specialist" badge. It existed at one point as evidenced by the revision list for the SO badge FAQ (revision #8), but it was not "turned on" since they hadn't decided on the requirements for it yet. Once they made tag-specific specialist badges, it disappeared. Maybe there's still a place-holder for it?

  • 1
    Good find! So I guess that's it for the 'missing' badges... Jun 30, 2009 at 2:21
  • I'm still wondering if 29 is another old one that fell by the wayside or a secret new one they haven't revealed yet... Jun 30, 2009 at 2:26
  • 3
    It's highly likely that it's the "Hacker" badge. Jeff's been promising to issue it since the private beta. blog.stackoverflow.com/2009/04/… Jun 30, 2009 at 4:09
  • Ahhhhh... I must have missed that blog post. Jun 30, 2009 at 4:35

Maybe they are the super-secret badges you have to earn before you know what they are?</theory></conspiracy>

SO's robots.txt disables caching on /badges so archive.org doesn't shed any light on what the pages once were. I would guess they are badges that were created, decided to be a bad idea and deleted

  • 3
    Nice detective work re: robots.txt/archive.org... I generally agree with your latter conclusion, although I'm secretly hoping for the former to be true. :)
    – Alconja
    Jun 29, 2009 at 1:31

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .