The largest I've seen posted on these forums is 22,900 individuals. At the time, that person had to ask the creator to increase the limit, and I believe it was doubled, so current speculation is that 40,000 is probably doable. That's enough to do every ancestor back 15 generations, but not 16 generations ![smiley smiley](http://answers.familyecho.com/qa-plugin/wysiwyg-editor/plugins/smiley/images/regular_smile.gif)