I've been on the site for a few years now, but just noticed for the first time that each Pinsider has a member number. You can see each member's number by viewing their public profile page.
So, here's the game. If your number is lower than the last one posted, then post a snapshot of your public profile showing your Pinsider number. Again, only post yours if it is a lower number than the last post in the thread at the time. Also, this is not a treasure hunt, so please do not post other member's numbers, only your own.
Mine is #36753, so it shouldn't be too hard to beat.