For a variety of reasons, the numbers used to identify accounts via Twitter’s API grow faster than the actual number of accounts in the system. Currently, user IDs fit in 32 bits—a standard size for integers on many platforms. In January, we explained that the current pace of Twitter user ID allocation meant that we’d exceed 32 bits sometime this year. All developers should make sure their code will handle the switch.

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Test accounts with user IDs greater than 32 bits