Problem 54119. Create the Ulam spiral

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Have you ever seen this wonderful spiral ? The Ulam Spiral is arranging prime numbers in a clockwise spiral starting in 0.

Given an n by n matrix of 0s, fill it with 1 if the number is prime, in that order :

[7 8 9;

6 1 2;

5 4 3;]

Which will give you :

[1 0 0;

0 0 1;

1 0 1;]

As you experiment, look out for the strange patterns that emerge!

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Solution Stats

68.18% Correct | 31.82% Incorrect

• 22 Solutions
• 14 Solvers

Last Solution submitted on Nov 03, 2023

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