I think this one may be so old nobody will remember it.
Rex Kars was convicted and sent to prison. During the exercise hour in the yard, he heard someone shout “23.” Everyone started laughing. Then he heard someone else shout”91.” Again everyone started laughing. This went on for a while with various numbers so when Rex was back inside, he asked his cellmate what was up. The cellmate said that these guys have been here for so long they’ve memorized the jokes, so nobody has to tell the joke, just shout out the number.
So the next day in the yard, Rex shouted “37.” No one laughed, total silence. Rex’s cellmate said, “Some guys just can’t tell a joke.”