![Numberphile on Twitter: "Sporting my Graham's Number T-Shirt today. Ron Graham himself occasionally wears one! https://t.co/0dnqxS8v5r https://t.co/ERl97n8SHa" / Twitter Numberphile on Twitter: "Sporting my Graham's Number T-Shirt today. Ron Graham himself occasionally wears one! https://t.co/0dnqxS8v5r https://t.co/ERl97n8SHa" / Twitter](https://pbs.twimg.com/media/CeJKZsxWoAApBYJ.jpg)
Numberphile on Twitter: "Sporting my Graham's Number T-Shirt today. Ron Graham himself occasionally wears one! https://t.co/0dnqxS8v5r https://t.co/ERl97n8SHa" / Twitter
![Numberphile on Twitter: "Three Circles t-shirt. https://t.co/i9yiL2iNL2 Video: https://t.co/JMeBngOdHu https://t.co/bx4wOk3FzW" / Twitter Numberphile on Twitter: "Three Circles t-shirt. https://t.co/i9yiL2iNL2 Video: https://t.co/JMeBngOdHu https://t.co/bx4wOk3FzW" / Twitter](https://pbs.twimg.com/media/Eo30HEyXUAIm3-t.jpg)
Numberphile on Twitter: "Three Circles t-shirt. https://t.co/i9yiL2iNL2 Video: https://t.co/JMeBngOdHu https://t.co/bx4wOk3FzW" / Twitter
![Numberphile on Twitter: "For a limited time the sparkly “foil” version of our golden spiral T-Shirt is in stock again… US: https://t.co/leO3MLch5k EU: https://t.co/D0dHpNL5QA https://t.co/z2cjChUYTT" / Twitter Numberphile on Twitter: "For a limited time the sparkly “foil” version of our golden spiral T-Shirt is in stock again… US: https://t.co/leO3MLch5k EU: https://t.co/D0dHpNL5QA https://t.co/z2cjChUYTT" / Twitter](https://pbs.twimg.com/media/DmRwm30W0AADoiJ.jpg)