Why is the Number “23″ used so often?

The movie The Number 23, starring Jim Carrey and Virginia Madsen, opens in theaters in the U.S. on February 23. We wouldn’t arbitrarily plug a movie, but this movie’s title does lead to an interesting conversation on Pearl Jam numerology.
A recurring theme for Eddie Vedder is the number 23. In the movie “The Number 23″, [...]