How many days were you're longer party? ..uhm about 2 days
How many days was the longest party you have ever had? Mine was about 2 days.
Personally, I dont know how you are classifing these parties, is this non-stop 24 hour days or are sleep breaks allowed? The number of days drinking every night for me is about a month, but that isn't a party as the number of people involved some nights was not high enough to be classified as a party.