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  1. results  2  3  4  5  6  7  8  9  10
  2. start    -  -  -  -  -  -  -  -  -
  3. 2prime   -  -  2  -  2  -  2  -  2    2<sqrt(10) so continue
  4. 3prime   -  -  2  -  23 -  2  3  2    3<sqrt(10) so continue
  5. 4skip    -  -  2  -  23 -  2  3  2    not prime so continue
  6. 5prime   -  -  2  -  23 -  2  3  25   5>=sqrt(10) so stop
  7.  
  8. look at what numbers have dashes
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https://ideone.com/TM85QL
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
secret

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