While at a hotel, waiting for some out-of-town friends to get ready, I went prime number hunting on the 11th floor.
I’m not especially good at factoring, so I just captured numbers that looked prime. I wasn’t thinking too hard about it, so I didn’t notice the one obvious non-prime until later, but the others looked pretty prime to me.
I expected more than one, but at least I didn’t come up empty.
Where are some other good places to go prime hunting?