What movie has his ID # as the title?

THX 1138 (1971)

IMDb synopsis:

George Lucas adapted this, his first film, from a short he made at University. THX 1138 (Robert Duvall), LUH 3417 (Maggie McOmie), and SEN 5241 (Donald Pleasence) attempt to escape from a futuristic society located beneath the surface of the Earth. The society has outlawed sex, with drugs used to control the people. THX 1138 stops taking the drugs, and gets LUH 3417 pregnant. They are both thrown in jail where they meet SEN 5241 and start to plan their escape. // Also in the cast are Don Pedro Colley, Ian Wolfe, Marshall Efron and Sid Haig.

TRIVIA:

Shortly after THX steals a police car and shortly before his fellow escapee crashes the one he tries to steal, you can hear someone on the radio say, "I think I ran over a wookie back there on the expressway."

George Lucas has worked the title of this film or parts of it in some of his other films. In "American Graffiti" (1973), the license plate of one car is "THX 138". In "Star Wars" (1977), a reference is made to "prison cell 1138". The cinema sound certification his company developed is called "THX". Lucas apparently named the film after his San Francisco telephone number, 849 1138; the letters "THX" correspond to letters found on the buttons 8, 4 and 9.

Here's a movie trailer:

http://www.youtube.com/watch?v=naso7_DFno8

This film is how I learned about George Lucas. When it was on HBO, I watched it every time and was amazed by it. Today, I'm still in awe of this film, which I pair up with the original version of "1984" and sometimes "Blade Runner" for a dystopian marathon. After the first two, "BR" is almost lighthearted!