I don’t know what they are but they ARE astronomical. My cousin and I have been doing geneology for years. We’ve traced my dad’s line back to Jamestown and my mother’s side back even further...1606 in Acadia, (they’re Cajuns) just tracing the father’s lineage is a feat, but add in the wive’s lines and both sides of their family and so on and in just a few generations you have thousands of entries, if you go wide enough. My cousin is doing a lot of that, but just thinking about it makes my brain hurt.
Traced my dad’s line back to London around 1420.