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      PRIME_SERIAL - Program to Count Primes
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      PRIME_SERIAL <br> Program to Count Primes
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    <p>
      <b>PRIME_SERIAL</b>
      is a FORTRAN77 program which
      counts the number of primes between 1 and N,
      and is intended as a starting point for a parallel version.
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    <p>
      The algorithm is completely naive.