How old was your longest living dog?

I found a pup many years ago. She was tossed into a fenced in lot where I worked. She was scared of every thing, turns out with good cause. I will condense a very long story. After feeding her for two weeks I decided to take her home. First was a trip to the vet as I had cats at home and did not want to take any diseases home. She was malnourished and abused but the vet said basically healthy. The vet put her at 5 months. I had her for 16 years. She developed kidney cancer and due to her age and the advanced stage of the cancer we had her euthanized. She has been gone longer than I had her and I still miss her.