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The only palindromic prime with prime digit d appearing d times. [Beedassy]
The smallest almost depression prime. (An almost depression prime is a palindromic prime of the form abb...bab...bba, where a>b). [Loungrides] 3:23:23 is the smallest primedigit palindromic prime time occurring at prime hours, prime minutes, and prime seconds, on a 12hour digital clock. [Loungrides]
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