[irq]

OK so Linus, like most, has 10 fingers and 10 toes: totaling 20.. Yet 4.21 was already assigned. What was the last thing he counted on? Guesses below.

[ianai]

Actually it’s enough to know that you’re beyond all appendages. Ie one plus all fingers+toes.

[sigstoat]

whatever it was, he was using a lot of it back for the 1.3 series, which made it up to 1.3.100 at least.

[andrewshadura]

I believe most people, Linus included, have 8 fingers and 2 thumbs, making it 10 digits in total.

[tsukikage]

...but you can count to 256 on 8 fingers...