Pi (1998)

Directed by: Darren Aronofsky

Cast: Sean Gullette, Mark Margolis and Ben Shenkman

 IMDb page about Pi

Studio(s):

Due to the extremely low budget (the entire movie was made for $60,000, no studio locations were used.

All locations featured in the movie are real, and were shot without filming permits (to save money). A lookout was used on set to watch out for police or other authorities.

Trailer: