the search operator "inurl:#" did not return any results.
check to make sure that your URLs follow the RFC-3986 standard for URIs. This document (recomended by Google) might give insight on using the # (Number Sign)
If you arne't trying to create a uniform resource indentifier, but just a uniform resource locator.. this site may help: http://www.blooberry.com/indexdot/html/topics/urlencoding.htm
Hope this helps, and if your question was answered please mark as answered