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Ive used eggs from the store that were 4-6 weeks past the exp. date that had just started to stand up in the bottom of the glass, the floaters would get tossed out. These are refrigerated eggs though. Here is a link to different techniques which used a 8 month unrefrigerated test.
The answer to this question may surprise you: while uncooked eggs typically last four to five weeks when properly refrigerated, hard-boiled eggs will only last about a week. This is because egg shells, which are highly porous, are sprayed before sale with a thin coating of mineral oil that seals the egg.he answer to this question may surprise you: while uncooked eggs typically last four to five weeks when properly refrigerated, hard-boiled eggs will only last about a week. This is because egg shells, which are highly porous, are sprayed before sale with a thin coating of mineral oil that seals the egg.