Slashdot reports that Facebook is moving to 64-bit user IDs. At the moment they’re using 32-bit, which allows 4.3bn profiles. One writer opines:

Despite having only 47 million users today, Facebook’s move to 64 bits will allow it to have more than 18 quintillion (18,446,744,074,000,000,000) user accounts. Of course, there are currently only about 6.5 billion people in the world. Is Facebook setting their sights beyond Earth or just trying to avoid what happened when Slashdot ran out of space for comment IDs last year? Perhaps they are planning to implement personas.

Read the story here.

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