User talk:Wythagoras/Rado's sigma function/Oracle TMs

I wonder how much faster growing  \(\Sigma_2(n)\) than  \(\Sigma(n)\). F or example  \(\Sigma_2(100)\) more than  \(\Sigma(100)\)  in googol times? Konkhra (talk) 10:35, March 20, 2014 (UTC)