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Darren Aronofsky's feature film debut was Pi, a 1998 independent psychological thriller film that he directed, wrote, produced, and edited. It is a low-budget film about a mathematician, Max Cohen (Sean Gullette), who becomes obsessed with discovering a secret code that he believes governs the universe. The film was a critical and commercial success, grossing over $4 million worldwide on a budget of just $60,000.