It doesn't get geekier than that
You all of course know about Erdős numbers. You might even be familiar with Bacon numbers.
But Erdős–Bacon numbers? This takes it to a completely different level. There are 23 people for whom the number is defined, including such luminaries as Bertrand Russell, Stephen Hawking, Richard Feynman, Carl Sagan and Natalie Portman.
I wonder if one of those will ever be up for sale...