As a person who is quite interested in mathematics, most of the topics in it have been flooded on the Internet, and there is nothing new. Maybe the director wants to use the elements of mathematics as a selling point, but he can't use real mathematical problems, because the audience may even Can't read the question. These topics, which I prefer to call brain teasers, have nothing to do with the promotion of the plot, and are far from the truth. They are only used as seasonings to promote the tension.
As for the ending, it was even more of a failure. Accidentally found an exit that could escape, rowed a boat to escape, and threw away the proof of Goldbach's conjecture. This arrangement can't help but seem a bit anticlimactic.
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