Mysterious ways indeed... Somehow I remember and can recite a 16 character hex ID for my account on Flipnote Studio on the Nintendo DS

When I would reserve a book at the public library, I'd get an automated phone call when the book arrived. The phone call always began by listing off my library card number.

So I know my first library card number was 1000102772901. I had to replace the card a few times, getting new numbers, but I only ever remembered the first one.

As do i. 32939464 probably haven't touched it in near 20 years ( guessing about 18 ). And whilst nostalgia is great, it would be great to free up memory sections of the brain like this :)

That's funny! I tried to remember it and typed what came to mind first into gmail and I got a hit from an archived GoogleTalk session from 2006. Layers upon layers of computer archeology.

"591007" does that make me and ICQ OG?

Checking in, also 8 digits, still memorized all these years later.

Same for me. I don't remember virtually any other numbers.