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Facebook's user ids are generated sequentially. If you register a new account today, your user id (without padding) will be over 1.2 billion [1]. I also find
by teej 16y ago
Facebook's user ids are generated sequentially. If you register a new account today, your user id (without padding) will be over 1.2 billion [1].
I also find it hard to believe that 75%+ of people who have -ever signed up for Facebook- would be active in the past month.
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[1] Obviously not all of these are real, many could have been deleted, etc. But we're talking about gross number of accounts, not humans.
- tlrobinson 16y agoThey haven't always been globally sequential though. It used to be of the form AAAABBBBB where AAAA was the school ID and BBBBB was the user ID within that school. I don't know where they started the current sequential IDs from, but it was probably at least 100,000,000, which would have allowed for 3 digit school IDs. I could be totally wrong though.
- dnaquin 16y agoFacebook user ids are not generated sequentially.
- char 16y agoI'm pretty sure the IDs aren't generated sequentially. Sometime in the last year or so, they started prepending '100000' onto each new user ID. Also, the rest of the new ID format is at least 11 digits long. I'm not sure how they did it in 2004, though.