30
8888
10 for a=1 to 10000
20 print a
30 next a
that should do it.
Wonko the Sane said:
It wasn’t my first choice but the mice were very insistent…
Three shall be the number thou shalt count, and the number of the counting shall be three. Four shalt thou not count, neither count thou two, excepting that thou then proceed to three. Five is right out.
13
Damn! I was gonna pick 3124.
I’ll take 2646. Unless 3124 is right, then I pick 3124 and I’m going to go make a lot of test posts. 
1984…piece of cake
Since 4 is my lucky number,
I say 4444.
That’s my lucky number too. But I’m just going with 4.
1973
4312
and it’s NOT my ATM PIN number, so don’t even think of trying it…
6977
1973 - my b-day!
whoops…already taken.
well then…like on the price is right…1974!
Y2K
5400
7,777
Man! Rachell took my answer too!!!
Oh well:
6351