Fermat's Room (Spanish: La habitación de Fermat) is a 2007 Spanish thriller film directed by Luis Piedrahita and Rodrigo Sopeña. Three mathematicians and one inventor are invited to a house under the premise of solving a great enigma, and told to use pseudonyms based on famous historical mathematicians. At the house, they are trapped in a room. They must solve puzzles given by the host, who calls himself "Fermat", in order to escape the slowly closing walls of the room.
The film opens with a small set of background pieces on the characters. One, a young mathematician, is shown discussing sums of prime numbers with some women, and it is revealed that he is scheduled to present a proof of Goldbach's conjecture. A friend approaches him letting him know that his office was broken into and his work destroyed, delaying any possibility of presenting it publicly. Another, an older mathematician, is shown playing chess with a friend who urges him to quit mathematics, citing many of the brilliant mathematicians eventually go insane. Lastly, a middle aged man is shown to receive a letter from an anonymous source using the name Fermat. The letter states that Fermat is organizing a meeting of
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