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The 7637th prime is 77711 (an emirp). Concatenation of 7637 and 77711; or 77711 and 7637, yields two more emirps (763777711 and 777117637). The smallest case of emirps of this form. [Bajpai]

 

  Submitted: 2015-02-22 08:04:12;   Last Modified: 2015-02-22 08:24:10.



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