Well it only makes sense that the event ID number is the primary key, where if we are unable to remember the name of an old event, or if a participant provides us a link to their old team page that is no longer active, all we have in the address bar is the event ID number. Having to search by TeamRaiser/Pagebuilder/Donation title only makes things very difficult. 

an example of what I'm talking about "TR?team_id=301771&fr_id=14242&pg=team", if we could search using that fr_id number it would make things a lot easier and efficient.

If a new hire comes along and changes the naming scheme, finding old and even new events become difficult. So please, integrate this feature, it would make everything much more efficient.