>>212536623
there's order 66 and the great jedi purge
order 66 is what we see in rots, the great jedi purge is what takes place over the next 19-20 years until anh
the purge started with 66, but they're technically not the same thing
a good number of jedi survived order 66 one way or another, usually being in the right place at the right time to disappear, but no more that ~400
for comparison according to one of the books released around tpm there were about 10,000 jedi at the time of that movie, and had been steadily whittled down over the clone wars
after the purge there were maybe 50 jedi at knight level or higher, with some more at padawan level scattered across the galaxy who weren't any threat to the empire and would only be hunted for propaganda purposes