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CA$47.35
per shirt
Ulam Spiral T-Shirt
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Style
Basic Dark T-Shirt
-CA$2.20
+CA$15.80
Colour & Print Process
Black
Vivid Printing: White Underbase
About T-Shirts
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About This Design
Ulam Spiral T-Shirt
If you plot every integer in a spiral and darken the prime numbers, something weird happens. A pattern emerges. There's no known way to predict where prime numbers will occur, but the beautiful spiral patterns they create taunt mathematicians with the possibility that there IS a way. Ulam, the mathematician who discovered this effect, did so while doodling on a napkin during a boring conference talk!
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4.7 out of 5 stars rating32.7K Total Reviews
32,707 Reviews
Reviews for similar products
5.0 out of 5 stars rating
5 out of 5 stars ratingBy Bob L.July 1, 2022 • Verified Purchase
Basic Dark T-Shirt, Black, Large
Zazzle Reviewer Program
They turned out exactly as we had hoped and we looked good even when we didn't bowl well. The printing was perfect and you can only see 9 pins on the shirt(the 5 pin hidden behind the headpin) which worked for us as we bowled in a 9 pin No-Tap league.
5.0 out of 5 stars rating
5 out of 5 stars ratingBy Toni D.November 6, 2022 • Verified Purchase
Basic Dark T-Shirt, Black, Small
Zazzle Reviewer Program
Great t-shirt!!! Quality is amazing and the colours are vibrant. Exactly how described!!! Can’t wait for my daughter to ask and give it to her confirmation sponsor. It’s also came earlier than I expected. Colours were exactly what I expected. The quality is amazing. The images couldn’t be any better. I’m very happy with his product and highly recommend it.
5.0 out of 5 stars rating
5 out of 5 stars ratingBy AnonymousJune 23, 2025 • Verified Purchase
Basic Dark T-Shirt, Navy Blue, Small
The shirt I ordered was too small. I contacted Zazzle and they replaced it with a larger size. Very happy.
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Other Info
Product ID: 235388429247982305
Designed on 2014-03-17, 6:14 AM
Rating: G