CPP
cpp
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#include <iostream>
#include <math.h>
using namespace std;
/*My favourite code*/
int prime(int i)
{
int j,c=0;
for(j=1;j<=i;j++)
{
if(i%j==0)
c++;
}
return c;
}
int main()
{
int i,c,p,f;
long long int x;
cin>>x;
cout<<"Mersenne Primes between 1 & "<<x<<endl;
for(i=1;i<=x;i++)
{
c=prime(i);
if(c==2)
{
for(p=1;p<=i;p++)
{
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OUTPUT
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