Who's the oldest one of all?

[Enzo Matrix]

Matrix might technically make the title of "Youngest Prime" since he's from a world inside a computer that makes seconds roughly the equivalent of years. So technically, he's less than a minute old. That said, to them time passes normally relative to ours, so he would technically be in his mid to late 20s, when everything is adjusted. EXCEPT he spent much of his youth in the games, which accelerated his aging relative to even his own world, so he might actually be 12 or 13 to his friends and family (minus AndrAIa and Frisket, who were with him for those adventures and aged alongside him). His age is given in binary at three points in the series, he starts as "01" then later is "10" and then is told that he hasn't been gone as long as he thinks, so he's only "11". But since time is all sorts of screwy in that world, there's no measure of what "3" refers to.

ReBoot has a very deep and fascinating lore that is never really explained in any depth.

Zack, on the other hand, is 23.

So no, neither of my guys are in the running for oldest.