Growing up, I didn't eat at home very often. Breakfast was a grab-and-go affair eaten in the car, lunch was from the school cafeteria, and dinner was usually at Grandma's house. But even though our fridge was usually pretty empty, there were always eggs inside. We didn't eat them very often, so I know those they sat around for weeks at a time, perhaps even more than a month.
We never got sick from eating those eggs, but how long can you, or really, should you keep them around?