Didn't try but titanium backup and greenify says I have root. Just enabled it in developer options. Don't install SuperSu. When root access is requested CM will ask you to allow it.
I have both the Note 4 and just received the S6 Edge this morning. The Note 4 is being sold. No regrets. After using the Edge since this morning the Note 4 feels very cheap. Also the Note 4 (Verizon) feels so sluggish and laggy versus the zippy S6.