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Cubic Diophantine equation

椭圆曲线 Math StackExchange 2 票 0 回答 50 浏览 提问者: Odail Gouttai 2026-06-04 12:09
number-theory elliptic-curves

问题内容

Problem:I am looking for help with the following Diophantine equation:

$$y^2 = x^3 - x^2 + 16$$

By working through the equation, I have successfully found 8 distinct non- negative integer solutions. The largest value of $x$ among all the solutions I found is $x = 112$ (which gives $y = 1180$).

My question is simple: Is $112$ provably the absolute largest integer solution for $x$, or is there a bigger one hidden further out?

If $112$ is the definitive maximum, could someone explain or link to the method used to prove that no larger solutions can exist?

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