What is the best data type for ISBN10 and ISBN13 in a MySQL datase
<p>For an application I'm currently building I need a database to store books. The schema of the books table should contain the following attributes:</p>

<p><code>id, isbn10, isbn13, title, summary</code></p>

<p>What data types should I use for ISBN10 and ISBN13? My first thoughts where a biginteger but I've read some unsubstantiated comments that say I should use a varchar. </p>