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                        31316913 8727147145 2100449741 4685822072 9781791489
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This number constitutes the home prime of 80, the largest known home prime for any two-digit composite integer and is achieved in 31 steps using the repeated factoring and concatenation procedure. [Schiffman]

 

  Submitted: 2010-06-25 15:48:51;   Last Modified: 2010-10-21 11:30:42.



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