Clicking on your link, the first post that appears is of a later date and time than the one below it.
Going to page 1 shows your post from today and page 899 is presumably your first post.
So I guess that as you put more posts in the 'front end', the page number of your older ones will increase. On the day Google's robot found the page, your post was on page 799.
It is not much help, but if the search points you to a particular page and the post is not there, at least you will know it has to be on a higher-numbered page.