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                                            2899999999 9999999999 9999999999
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The only non-titanic prime formed from a perfect number n followed by n times a digit d., i.e., 28 followed by 28 9’s. [Loungrides]

 

  Submitted: 2012-07-29 09:49:38;   Last Modified: 2016-08-15 08:36:55.



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