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David MacQuarrie's PrimeTimeClock will only display the time (as hours:minutes:seconds) if the corresponding number is prime. It displays 7669 different times each day and indicates whether a prime is special (e.g., a Sophie Germain prime) by illuminating its beacon in different colors.

 

  Submitted: 2008-01-14 19:29:57;   Last Modified: 2008-07-31 19:36:28.



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