The Ulam Spiral

Megan Schmidt got playing around with number patterns charted out on a square number spiral to see what visual pattern results. Super fun and very mathematical. After I made a sketch to do her investigation, I realized I got Ulam's Spiral basically for free. K controls the length of the spiral, 1 to K. The check number lets you locate a particular value and see if it's prime. The command to find spot n in the spiral is spiralspot[n].


John Golden

Material Type
spiral  prime  ulam 
Target Group (Age)
8 – 19+
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