[smashed]

The last release number was 5.19.

Linux 6.0 could have been versioned as 5.20 but Linus chose 6.0 out of thin air. Nothing more nothing less.

[usr1106]

4.20 exists, but 3.20 and 5.20 don't. I don't think there is any meaning to the numbers. It has been "the next release" since the 2.15 branch has been abandoned.