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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

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There are 53 prime numbers below a thousand where the sum of the squared digits of that prime is also prime. The first being 11 = 1^2 + 1^2 = 2 and the last 997 = 9^2 + 9^2 + 7^2 = 211. [Homewood]

 

  Submitted: 2018-12-30 11:15:08;   Last Modified: 2018-12-30 11:35:45.



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