HAI 1.3

HOW IZ I Faktorial YR Number
  BOTH SAEM 1 AN BIGGR OF Number AN 1
  O RLY?
   YA RLY
    FOUND YR 1
   NO WAI
    FOUND YR PRODUKT OF Number AN I IZ Faktorial YR DIFFRENCE OF Number AN 1 MKAY
  OIC
IF U SAY SO

IM IN YR Loop UPPIN YR Index WILE DIFFRINT Index AN 13
  VISIBLE Index "! = " I IZ Faktorial YR Index MKAY
IM OUTTA YR Loop
KTHXBYE