Fermat's Room (2007)
Original title: La Habitación de Fermat
Fermat's Room is a 2007 Spanish-language mystery movie directed by Luis Piedrahita and Rodrigo Sopeña, with a running time of 1h 28m. It stars Lluís Homar, Santi Millán and Alejo Sauras.
Four mathematicians are imprisoned in a shrinking room; with the walls closing in, they must try anything to escape this fatal puzzle.