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Poor primes (Posted on 2015-05-04) Difficulty: 2 of 5
101 is the smallest prime whose sum of the digits i.e. 2 is less than the number of its digits (3).

Compile a list of all primes below 10^10 with this feature.

No Solution Yet Submitted by Ady TZIDON    
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  Subject Author Date
Solutioncomputer solutionCharlie2015-05-04 19:22:39
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