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  1. #include <iostream>
  2. #include <cmath>
  3.  
  4. /* *************** **
  5. **    LA BOMBE     **
  6. ** *************** */
  7.  
  8. void MersennePrime(int* i, int* j, int startAt)	{
  9. 	if (startAt <= 1) startAt = 2;
  10. 	*j = startAt;
  11. 	bool prime = false;
  12.  
  13. 	while (!prime)	{
  14. 		for (;;(*j)++)	{
  15. 			prime = true;
  16. 			for (int k = 2; k <= *j / 2; k++)	{
  17. 				if (*j % k == 0)	{
  18. 					prime = false;
  19. 					break;
  20. 				}
  21. 			}
  22. 			if (prime) break;
  23. 		}
  24. 		*i = pow(2, *j) - 1;
  25. 		for (int k = 2; k <= *i / 2; k++)	{
  26.       		if (*i % k == 0)	{
  27.           		prime = false;
  28.           		break;
  29.       		}
  30.       		if (!prime) break;
  31. 		}
  32. 	}
  33. }
  34.  
  35. int main(void) {
  36. 	int i = 0, j = 0, k = 0, l = 0;
  37.  
  38. 	MersennePrime(&i, &j, i);
  39. 	MersennePrime(&k, &l, i);
  40.  
  41. 	std::cout << i << j << k << k;
  42. 	return 0;
  43. }
  44.  
  45.  
  46.  
Success #stdin #stdout 0s 3296KB
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3277
https://ideone.com/UXtgAB
La Bombe : Mesrenne
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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