After the showing, there was a panel discussion with the director, composer, producer, two actors (Stephen Fry!), and three consulting mathematicians who helped the production. One of the topics that came up was the recent (finally!) interest in Hollywood for making movies about technical people. Since the dawn of cinema, we've made movies about artists, writers, and poets. But it is only recently that we've started making movies about scientists (Stephen Hawking) and mathematicians (Alan Turing).
In my opinion, this movie puts both The Theory of Everything and The Imitation Game to shame. It is much more moving and beautiful than both, and it doesn't fall into the either the trap of overly simplifying the math, nor of overly dramatizing his life. If you have any interest in math, science, or computer science (much of which is underpinned by his work in number theory), I highly encourage you to go see this film.