When will the end come to this summer heat??? As soon as Sirius is separated from the sun!!! In 24 hours, come join us to help hasten Sirius' departure and thus, bring back cooler days. A 48 hour Challenge is being offered on the 321 Prime Search (Sieve). For more information, please see this <a href="http://www.primegrid.com/forum_thread.php?id=2645&nowrap=true#25501" rel="nofollow">forum thread</a>.