I was told that they last the longest if kept out of the fridge the first week or so and afterwards you should put them in a fridge. And for some reason if they are already refrigerated they need to stay refrigerated no matter how old. No idea if there is a scientific basis to it, but it sounds at least plausible that there is.
And for some reason if they are already refrigerated they need to stay refrigerated no matter how old.
It has to do with washing. Eggs, fresh from a chicken’s poophole, have a protective layer around them that allows you to store them at room temperature. If you wash them though, the protective layer disappears and the egg shell becomes porous, and as a result you need to refrigerate them. If you buy eggs that are already refrigerated, they are likely refrigerated because they have been washed, so you should keep them refrigerated as well.