'PRIME_NUMBER_MPI
  C/MPI version

  An MPI example program to count the number of primes.
  The number of processes is 1

         N        Pi          Time

         1         0        0.000016
         2         1        0.000006
         4         2        0.000006
         8         4        0.000006
        16         6        0.000006
        32        11        0.000012
        64        18        0.000026
       128        31        0.000073
       256        54        0.000236
       512        97        0.000834
      1024       172        0.002885
      2048       309        0.010342
      4096       564        0.029123
      8192      1028        0.090114
     16384      1900        0.333283
     32768      3512        1.234586
     65536      6542        4.616446
    131072     12251       17.351485

PRIME_NUMBER_MPI - Master process:
  Normal end of execution.