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<!-- manual page source format generated by PolyglotMan v3.2, -->
<!-- available at http://polyglotman.sourceforge.net/ -->
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2//EN">

<html>
<head>
  <meta name="generator" content=
  "HTML Tidy for Linux (vers 25 March 2009), see www.w3.org">

  <title>MATHO-PRIMES(1) manual page</title>
</head>

<body bgcolor='white'>
  <a href='#toc'>Table of Contents</a>

  <h2><a name='sect0' href='#toc0'>Name</a></h2>matho-primes -
  generate consecutive prime numbers

  <h2><a name='sect1' href=
  '#toc1'>Synopsis</a></h2><b>matho-primes</b> [start [stop] or
  "all"] ["twin"] ["pal" [base]]<br>
  <b>matho-primes</b> [-htuv] [-c count] [-m number] [-p base]
  [start [stop]]

  <h2><a name='sect2' href='#toc2'>Description</a></h2>This
  command-line utility is optionally part of the <a href=
  'mathomatic.1.html'><b>mathomatic</b>(1)</a> package. It quickly
  computes any number of consecutive prime numbers using a
  windowing, memory efficient sieve of Eratosthenes algorithm,
  dumping them to standard output. They are displayed one prime per
  line in ascending order, unless the "twin" option is specified,
  which displays only twin primes, two primes per line.

  <p>Generates up to 18 decimal digit primes, or whatever is the
  number of digits of precision for a floating point <b>long
  double</b> in the C compiler used to compile this utility. Note
  that this utility might be compiled to use only double precision
  floating point, if long double precision is not fully supported
  by the C compiler or hardware, allowing at most 15 decimal digit
  primes in that case.</p>

  <p>Ways to verify that this utility is working are to pipe the
  output into the Unix "factor" utility, or compare the output with
  the BSD Games "primes" utility, using the supplied shell script:
  <b>examples/testprimes.</b></p>

  <p>All numbers displayed by this utility are decimal (base 10)
  prime numbers. A prime number is an integer that cannot be
  factored.</p>

  <p>A range may be specified on the command line, otherwise the
  starting number and the number of primes to output is prompted
  for. The range is <b>start</b> to <b>stop</b> inclusive, and
  <b>stop</b> must be greater than or equal to <b>start.</b></p>

  <p>If the <b>-c</b> option is specified, the number of lines of
  primes displayed is limited to the decimal count that follows
  this option.</p>

  <p>If the <b>-t</b> or "twin" option is specified on the command
  line, only <b>twin primes</b> will be displayed. Twin primes are
  two primes that differ in value by 2. Each twin pair is displayed
  together on the same line separated by a space character.</p>

  <p>If the <b>-p</b> or "pal" option is specified on the command
  line, only <b>palindromic primes</b> are displayed. Palindromes
  are symmetrical, they read exactly the same forward and backward.
  The palindromic number <b>base</b> may be specified, the default
  is base 10. The <b>base</b> can be any integer greater than 1.
  Primes are always displayed in decimal (base 10).</p>

  <p>The version number and short help on the allowed command-line
  parameters and usage information are displayed when given the
  <b>-h</b> option.</p>

  <p>With the <b>-u</b> option, all output (standard output and
  standard error output) is set to be unbuffered, making all output
  happen immediately, instead of when the output buffer is full or
  when the program terminates or waits for input.</p>

  <p>The <b>-m</b> option changes the memory size of the prime
  number sieve window. It is followed by a decimal, floating point
  number which is a multiplier of the default window size (2
  megabytes). It is possible that changing the memory size may
  speed up the total run time a bit; otherwise there is no reason
  to use this option, and its use is not recommended.</p>

  <p>The <b>-v</b> option simply displays the program name and
  version number, and then exits successfully.</p>

  <h2><a name='sect3' href='#toc3'>Author</a></h2>George Gesslein
  II (gesslein@mathomatic.org) at "<a href=
  'http://www.mathomatic.org'>http://www.mathomatic.org</a> ".

  <h2><a name='sect4' href='#toc4'>Reporting Bugs</a></h2>If you
  find a bug, please report it to the author or at "<a href=
  'https://launchpad.net/mathomatic'>https://launchpad.net/mathomatic</a>
  ".

  <h2><a name='sect5' href='#toc5'>See Also</a></h2><a href=
  'rmath.1.html'><b>rmath</b>(1)</a> , <a href=
  'mathomatic.1.html'><b>mathomatic</b>(1)</a> , <a href=
  'primorial.1.html'><b>primorial</b>(1)</a> , <a href=
  'matho-mult.1.html'><b>matho-mult</b>(1)</a> , <a href=
  'matho-sum.1.html'><b>matho-sum</b>(1)</a> , <a href=
  'matho-pascal.1.html'><b>matho-pascal</b>(1)</a> , <a href=
  'matho-sumsq.1.html'><b>matho-sumsq</b>(1)</a>
  <hr>

  <p><a name='toc'><b>Table of Contents</b></a></p>

  <ul>
    <li><a name='toc0' href='#sect0'>Name</a></li>

    <li><a name='toc1' href='#sect1'>Synopsis</a></li>

    <li><a name='toc2' href='#sect2'>Description</a></li>

    <li><a name='toc3' href='#sect3'>Author</a></li>

    <li><a name='toc4' href='#sect4'>Reporting Bugs</a></li>

    <li><a name='toc5' href='#sect5'>See Also</a></li>
  </ul>
</body>
</html>

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