Jack and the numbers

let me first say that my memory of Lost is fading
fast...but last night i was falling asleep replaying
the episode in my head (and you both wonder why i'm
still single?...lol) and something dawned on
me....follow me here. Desmond runs out of the
bunker...Jack chases him through the jungle...Jack
catches Desmond and Desmond tells him "you need to
enter this code...i'm going to tell it to you, so pay
attention...4,8,15,16.." then Jack yells "Shut the
hell up" or something like that...right so far?
ok...so Jack and Desmond get all teary eyed after that
talking about Jack's former wife...we see the entire
dialog...and then Desmond runs away again. cut back to
the bunker...Locke types in the correct numbers...but
he gets the last one wrong. Jack shows up in true
hero-boy style and tells him "it's 42...the last
number is 42"...now, maybe its just me, but who told
Jack the last number? Jack never let Desmond finish
the string of numbers before he interrupted him...then
Desmond ran off. yet, Jack tells them all that Desmond
told him...but he didn't. am i way off base here?

Hurley had talked to Jack about the numbers when Jack asked why Hurley was so freaked out about them blowing the lid to the hatch (he saw the numbers on the hatch right before Locke lit the fuse). So, did he repeat all the numbers to Jack during that conversation?

Yeah, Hurley told the numbers to Jack in the Jungle and Desmond also repeated the numbers twice to Jack...he may have caught it the second time.