The neutron number of cobalt 60 should be 33 instead of 43 (proton number 27), which is a calculation error.
What exactly are you looking at? It is 33. PLEASE UPDATE GT6 SERIOUSLY!!!
Edit: LOOK AT THIS, this is from August 2020!
P.S. I would not be so angry if you didn’t completely ignore me when i told you to update GT6 last time!