How long does a deleted jira project's name take to clear before the name can be used again?

[Steve Hooczko]

Have waited over 24 hours and still can't reuse the project name.

[Nic Brough -Adaptavist-]

They do not clear, you can't reuse the project keys.

[Steve Hooczko]

The project name freed up, so was able to reuse it.