Stranger Than Fiction

From IMDB: Dustin Hoffman's character (Professor Hilbert) creates a questionnaire of 23 items forWill Ferrell's character (Harold Crick). Professor David Hilbert, the German mathematician, proposed a famous list 23 problems at the International Congress of Mathematicians in Paris in 1900. Hilbert's problems became so famous that they are typically referred to by number among mathematicians and philosophers and several are still unanswered.