Recent Posts Advance to "Last" leads to nowhere

Hopefully I got the right location for this and have it categories correctly

Being at a loose end and looking at the Recent Posts I decided to see how many pages of Recent Posts there was, so I chose "Last

On arriving at the page 13912 in the URL , the page was empty. Wondering how many empty pages I found I could go back as far as 13589 before therer was any content

So in theory 300+ empty pages