Questions about #c language # : Each line of 8 output 100-999 internal primes, do not understand what went wrong

Problem: Output primes within 100 to 999 in rows of 8.
Error: The non-prime number 591 occurs. Don't understand what went wrong
code:

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int i,j,count;
    count=0;
    for(i=100;i<999;i++)
    {
        for(j=2;j<=i;j++)
        {
            if(i%j==0)
            {
                break;
            }
            else
            {
                count++;
                printf(" %d ",i);
                if(count%8==0)
                  {
                       printf("\n");
                  }
                  break;
            }
        }
    }
    return 0;
}

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