Could this be the longest 'thread' ever?

Whilst looking for something today I came across this......

(Yes, I have visited the beautiful Blue Mountain Canada)

Inside it is stored...

I'm wondering if I have the longest knitting project ever?
When our daughter was born in 1982 I was a little strapped for cash, and with Christmas on the horizon I figured I could knit my dear husband a jumper in time for the great day.  I remember taking Vicky in her pushchair on a freezing October day in search of inspiration!  I found a great knitting pattern for a 'Guernsey' jumper,

 which I purchased along with the number of balls of wool required.

Now, as my husband is a long distance lorry driver I had a lot of evenings on my own so keeping it a secret wasn't a problem.  I cast on, and I was off!  I knitted the back of the jumper.....then I started on the front of the jumper, and started the decreasing for the arm and neck shaping.  I just never got any further!

 I have over the ensuing years picked it up and done another couple of rows  here and there - but things change....people put on a little weight (no names but that's me included!)  Do I actually have enough wool to finish the project?  Am I motivated to complete the project?  So twenty eight years on.... and it's STILL NOT FINISHED!

Can anyone beat this?   I'd LOVE to know!  What would you do with it, finish it or leave it as it is? 
I REALLY couldn't face undoing it.  Looking forward to your replies :o)

Before I close, I really must welcome new followers!  It's great you see you here :o)

My very best wishes