Problem 52724. Easy Sequences 20: Counting Prime-sided Rectangles

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Solution 9727873

Submitted on 10 Nov 2022 by GeeTwo

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GeeTwo on 10 Nov 2022

At last! A truly MATLAB-like solution that doesn't time out! Essentially the same as one of my earlier solutions, but forcing that big array of ones and zeros to be int8 rather than double. Logical was just a touch slower than int8.

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Problem 52724. Easy Sequences 20: Counting Prime-sided Rectangles

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Problem 52724. Easy Sequences 20: Counting Prime-sided Rectangles

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