This number is a prime.

+ 23:53:37 is the largest prime-digit prime time occurring at simultaneously prime hours, prime minutes and prime seconds on a 24-hour digit clock. Note the prime-digit prime sum of digits and the prime number of seconds (86107) equivalent to the prime time. [Beedassy]

+ The smallest prime-digit prime formed from three distinct double-digit primes. [Loungrides]

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