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  1. #include <iostream>
  2. #include <cmath>
  3.  
  4. bool is_prime(unsigned long x)
  5. {
  6.     unsigned long n = sqrt(x);
  7.     if (x%2 == 0) return false;
  8.     for(unsigned long  i = 3; i <= n; i+=2)
  9.     {
  10.         if (x%i == 0)
  11.         {
  12.             return false;
  13.         }
  14.     }
  15.     return true;
  16. }
  17.  
  18.  
  19. int main()
  20. {
  21.     for(int n = sqrt(106000000/2)-1; n < sqrt(107000001/2)+1; n++)
  22.     {
  23.         if (is_prime(n))
  24.         {
  25.             int m = n*n*2;
  26.             if (m <= 107000001 && m >= 106000000) std::cout << m << "\n";
  27.         }
  28.     }
  29. }
  30.  
Success #stdin #stdout 0s 5520KB
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Standard input is empty
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106084178
106492418
106784498
106842962
https://ideone.com/FBKkw8
language:
C++14 (gcc 8.3)
created:
3 years ago
visibility:
public

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