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Sale Price $14.44.
Original Price $18.05 Comp. value
per shirt
You save 20%
Ulam Spiral T-Shirt
Qty:
Style
Basic Dark T-Shirt
-$1.05
+$7.45
Color & 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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Customer Reviews
4.7 out of 5 stars rating31.5K Total Reviews
31,479 Reviews
Reviews for similar products
5 out of 5 stars rating
By Jenny S.September 9, 2025 • Verified Purchase
Value T-Shirt, Black, Adult S
My 11 yo wore adult XL (5’7” 165#). The 8yo is small framed. She wore adult small and tied it in the back. Dark haired male wore adult large and 5’9”, 110# female wore adult medium . Good quality dark Heather gray, Gildan brand shirt. -it was next up from basic choice and cost about $20 per shirt. Not too thick or thin. Washed and dried well, no major shrinkage. Not see-through. Can wear a bra under it fine. Screen print is just as shown and well done, front and back.
5 out of 5 stars rating
By Jenny S.September 9, 2025 • Verified Purchase
Value T-Shirt, Black, Adult S
My 11 yo wore adult XL (5’7” 165#). The 8yo is small framed. She wore adult small and tied it in the back. Grandma wore adult large with long sleeve shirt underneath. Tall girl adult medium. Dark haired male adult large. Good quality dark Heather gray, Gildan brand shirt. -it was next up from basic choice and cost about $20 per shirt. Not too thick or thin. Washed and dried well, no major shrinkage. Not see-through. Can wear a bra under it fine. Screen print is just as shown and well done, front and back.
5 out of 5 stars rating
By Jenny S.September 9, 2025 • Verified Purchase
Value T-Shirt, Black, Adult S
My 11 yo wore adult XL (5’7” 165#). The 8yo is small framed. She wore adult small and tied it in the back. Good quality dark Heather gray, Gildan brand shirt. -it was next up from basic choice and cost about $20 per shirt. Not too thick or thin. Washed and dried well, no major shrinkage. Not see-through. Can wear a bra under it fine. Screen print is just as shown and well done, front and back. Everyone loved them!! .
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Other Info
Product ID: 235388429247982305
Created on: 3/17/2014, 6:14 AM
Rating: G
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