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<h1>The International Obfuscated C Code Contest</h1>
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<h2>2000/bellard - Most Specific Output</h2>
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</div>
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<a class="Left" href="../anderson/index.html">← anderson</a>
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<a class="Left" href="../index.html">↑ 2000 ↑</a>
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<a class="Left" href="../bmeyer/index.html">bmeyer →</a>
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<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/bellard/bellard.c">C code</a>
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<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/bellard/Makefile">Makefile</a>
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<a class="Right" href="#inventory">Inventory</a>
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<a class="Right" href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F2000%2Fbellard%2Findex.html">✓</a>
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<h2 id="author">Author:</h2>
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<ul>
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<li>Name: <a href="../../authors.html#Fabrice_Bellard">Fabrice Bellard</a><br>
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Location: <a href="../../location.html#FR">FR</a> - <em>French Republic</em> (<em>France</em>)</li>
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</ul>
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<!-- BEFORE: 1st line of markdown file: 2000/bellard/README.md -->
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<h2 id="to-build">To build:</h2>
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<pre><code> make</code></pre>
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<h2 id="to-use">To use:</h2>
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<pre><code> ./bellard</code></pre>
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<h2 id="judges-remarks">Judges’ remarks:</h2>
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<p>This code is a nice compact example of a Modular Fast Fourier Transform. While
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its output is very specific, the internal FFT has a wide variety of uses.</p>
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<p>Can you modify this code to produce primes such as <code>23523*2^70000-1</code>,
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<code>48594^65536+1</code> or <code>6917!-1</code>?</p>
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<p>NOTE: as bigger primes are found as time goes by this program no longer prints
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the biggest prime once noted by the author below.</p>
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<h2 id="authors-comments">Author’s comments:</h2>
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<p>This program prints the biggest known prime number (<code>2^6972593-1</code>)
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in base 10. It requires a few minutes. It uses a Modular Fast
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Fourier Transform to compute this number in a reasonable amount
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of time (the usual method would take ages !).</p>
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<p>The program uses >= 64 bit <code>long long</code> type. It should run on any
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system with a gcc compiler.</p>
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||
<!--
|
||
|
||
Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.
|
||
|
||
You are free to share and adapt this file under the terms of this license:
|
||
|
||
Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
|
||
|
||
For more information, see:
|
||
|
||
https://creativecommons.org/licenses/by-sa/4.0/
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-->
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<!-- START: this line starts content generated by: bin/output-index-inventory.sh -->
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<div id="inventory">
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<h1 id="inventory-for-2000bellard">Inventory for 2000/bellard</h1>
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</div>
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<h2 id="primary-files">Primary files</h2>
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<ul>
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||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/bellard/bellard.c">bellard.c</a> - entry source code</li>
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||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/bellard/Makefile">Makefile</a> - entry Makefile</li>
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||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/bellard/bellard.orig.c">bellard.orig.c</a> - original source code</li>
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||
</ul>
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||
<h2 id="secondary-files">Secondary files</h2>
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||
<ul>
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||
<li><a href="2000_bellard.tar.bz2">2000_bellard.tar.bz2</a> - download entry tarball</li>
|
||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/bellard/README.md">README.md</a> - markdown source for this web page</li>
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||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/bellard/.entry.json">.entry.json</a> - entry summary and manifest in JSON</li>
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||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/bellard/.gitignore">.gitignore</a> - list of files that should not be committed under git</li>
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||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/2000/bellard/.path">.path</a> - directory path from top level directory</li>
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||
<li><a href="index.html">index.html</a> - this web page</li>
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||
</ul>
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||
<hr style="width:10%;text-align:left;margin-left:0">
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<h4>
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Jump to: <a href="#">top</a>
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<!--
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Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.
|
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|
||
You are free to share and adapt this file under the terms of this license:
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|
||
Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
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|
||
For more information, see:
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<div id="copyright"><h3>Copyright © 1984-2024 by Landon Curt Noll:
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<a href="https://creativecommons.org/faq/#what-does-some-rights-reserved-mean"
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target="_blank"
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rel="license noopener noreferrer">Some Rights Reserved</a></h3>
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<p>
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This work is <b>licensed by Landon Curt Noll</b> under
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target="_blank"
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style="display:inline-block;">CC BY-SA 4.0</a></b>.
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src="../../png/cc.png"
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alt="cc inside circle symbol">
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src="../../png/by.png"
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You should <b>carefully review</b> the
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before using the licensed material.<br>
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You may wish to review the
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