Clarity on the maxTimeToLive passed in authClient for Internet Identity

Right, my use case is primarily syncing data between devices, so I am primarily looking for a way to have auth never expire. In case it absolutely has to, I am looking for the maximum possible value that the IC supports. I was reading on this thread that it’s close to 8 days, but knowing the EXACT maximum value that is practically possible would be helpful

@kpeacock @PaulLiu Any thoughts?