Is there any way, in an iRule, to see if an APM session exists using the regular SID format?

@Kunjan: Thanks, but no, that won't help, because in my scenario the MRHSession cookie is deleted. I only have the "LastMRH_Session" cookie, which has the shorter 8 character number.

@John: I believe the 8 characters are unique though, because again, they use them literally everywhere inside the product, such as in all the reports, in the "Manage Sessions" screen, etc. Those eight characters are even on every single web request as the "LastMRH_Session" cookie. Yes, the F5 seems to salt it when putting it in the MHRSession cookie to prevent an attacker from forging a request, but it only does that for HTTP requests. Internally in the system it seems to be the unsalted eight characters everywhere, and I'd just like to find a way to look it up using that widespread format.

Any other ideas?