I'm interested in the theoretical minimum number, so like the extruded buckyball ball? I'm trying to work out if there are enough carbon atoms in a 'piece of paper' to reach the moon. :) Which brings me to the next question : how many carbon atoms are there in a piece of paper? Or perhaps a better way of putting it would be, how big a piece of paper would you need - would a sheet of A4 paper get you there? This all comes from me coming across that idea that if it was possible, you'd only have to fold a piece of paper 44 times to reach the moon! ie by doubling the thickness 44 times, you'd exceed the distance from the earth to the moon.