#include<stdio.h>
#include<stdlib.h>
int main(void)
{
    int count=0;
    int count1=3;
    int faulse=0;
    int trail=5;
    int *prim=NULL;
    printf("\nHow many digits need ");
    scanf("%d",&count);
    count>4 ? count:4;
    prim=(int*)malloc(count*sizeof(int));
    while(count1<count)
    {
      *prim=2;
      *(prim+1)=3;
      *(prim+2)=5;
      trail += 2;
      for(int i=0;i<count1;i++)
      {
       faulse=trail%*(prim+i);
       if(faulse==0)
           break;
      }
      if(faulse>0)
      {
          *(prim+count1++)=trail;
      }
    }
    while(--count1>=0)
    {
        if(count1%5==0)
        {
            printf("\n");
        }
        printf("%5d",*(prim+count1));
    }
    printf("\n");
    for(int j=0;j<count;j++)
    {
        if(j%5==0)
        {
            printf("\n");
        }
        printf("%5d",*(prim+j));
    }
    return 0;
}