Sorry mate, are you asking how long has anyone lived with advanced prostate cancer, but taking no treatments?
Or how long has anyone lived with advanced prostate cancer?
If it's the first, we probably have no idea as they would be gone pretty quickly.
If it's the 2nd, there is an American guy who is still alive 22 years after diagnosis and there is a poster on this forum who is 19 years post PCa diagnosis.
Statistically in England 30% of men diagnosed with Stage 4 PC, survive their disease for 5 years or more.
Hope this helps.