We discussed a similar thing a couple of years ago: https://news.ycombinator.com/item?id=16192608 https://news.ycombinator.com/item?id=16192608 Here's a prime

We discussed a similar thing a couple of years ago: https://news.ycombinator.com/item?id=16192608 https://news.ycombinator.com/item?id=16192608 Here's a prime smiley face (with code) I generated at the time: https://news.ycombinator.com/item?id=16192922 https://news.ycombinator.com/item?id=16192922