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# 2521

This number is a prime.

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2521^{2} = 1456^{3} - 1455^{3}, i.e., one solution to the Diophantine equation z^{2} = x^{3} - y^{3}. A Diophantine equation is a polynomial equation in which only integer solutions are allowed. These are named after the Greek algebraist Diophantus who lived in the 3rd century. [Mizuki]

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