http://openproblemgarden.org/op/giugas_conjecture_on_primality Comments for "Giuga's Conjecture on Primality" en http://openproblemgarden.org/op/giugas_conjecture_on_primality <table cellspacing="10"> <tr> <td> Author(s): <a href="/category/giuseppe_giuga">Giuseppe Giuga</a>&nbsp;&nbsp; </td> <td align=right> Subject: <a href="/category/number_theory_0">Number Theory</a>&nbsp;&nbsp; </td> </tr> <tr> <td colspan=2> <table border=1 cellspacing="5"> <tr><td> <div class="envtheorem"><b>Conjecture</b>&nbsp;&nbsp; <img class="teximage" src="/files/tex/928cd9d544fdea62f88a627aaee28c416c4366c0.png" alt="$ p $" /> is a prime iff <img class="teximage" src="/files/tex/5c5ea2da03b0c369bcc48f9d7845e248b76b5869.png" alt="$ ~\displaystyle \sum_{i=1}^{p-1} i^{p-1} \equiv -1 \pmod p $" /> </div> </tr></td> </table> </td> </tr> </table> Giuseppe Giuga primality Number Theory http://openproblemgarden.org/op/giugas_conjecture_on_primality#comment Tue, 27 Mar 2012 09:14:29 +0200 princeps 37411 at http://openproblemgarden.org