Open Problem Garden - perfect number - Comments http://www.openproblemgarden.org/category/perfect_number Comments for "perfect number" en perfect number http://www.openproblemgarden.org/category/perfect_number <br /> http://www.openproblemgarden.org/category/perfect_number#comment Sat, 27 Sep 2008 22:55:52 +0200 2148 at http://www.openproblemgarden.org