<p>This question was inspired by Peter Cock 's tweet</p>

https://twitter.com/pjacock/status/118012750105546752

<p>Most softwares (C, java...) use a int32 (unsigned or not) to store the length of the chromosome. It isn't enough when the length of a chromosome is greater than INT_MAX or UINT_MAX</p>

<pre><code>#  define INT_MAX    2147483647
#  define UINT_MAX    4294967295U
</code></pre>

<p>So my question is:</p>

<ul>
<li>Is there any resource where one can find the length of the chromosomes. Something like <a href='http://bionumbers.hms.harvard.edu/'>BioNumbers</a>.</li>
<li>What's the length of the longest chromosome ? </li>
</ul>

I just remembered reading an article on the largest genome size. It claims the flower named Paris Japonica has 150 billion bases over 40 chromosomes,

I would imagine that the largest chromosome is bigger than the UINT_MAX. Alas a quick search did not turn up any sequence information. Most likely the size of the DNA was measured by other means.