Old apple tree

So In the woods at edge of my property I have discovered a HUGE old apple tree.  It unfortunately was taken down by an even bigger black cherry but is still alive with roots in the ground.  Tree has a diameter of 20 inches, and I estimate was at least 40 ft tall upright but hard to say.  My “PictureThis is” app says it is a “paradise” apple.  White flowers in April/May, round red apples in fall.  2 years ago Apple drop was good last year not as much.  I don’t treat it and it’s surrounded by other brush and trees.  

Any idea how old this tree can be?  I never saw one so big.  About 3-4 feet up it does have a twist like maybe it was grafted but I’m not a tree expert so not sure.

Hi Matt, welcome to permies!

It would be really helpful to know roughly at least where you are located. A 40' (using feet so probably US) apple tree in Colorado might be 100 years old. In an optimal location we get nondwarf fruit trees here that reach that height in a generation. If its down- count the rings.

If you are waiting to get some scions from it before you admit defeat, you can get them custom grafted if you dont graft yourself. I think Hidden Springs offers this service. http://hiddenspringsnursery.com/

I am in Massachusetts .

Tree is laying down but alive, down but roots still in the ground so not going to cut it (and hence can’t count rings ).