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8422353177 3495645465 1203551253 0001279481 2598542488 6045434898 9451026887
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A prime factor of 2^1181-1. Note that the digit-length of the factor and 1181 are emirps.

 

  Submitted: 2010-11-01 21:05:21;   Last Modified: 2011-01-15 09:20:01.



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