3 days? I've had my note for a year and a half and just gave up on disabling it. This has saved me from throwing it against the wall to shut it up. My wife says it wakes her up in the middle of the night. Not anymore!
I think it's Google services. Note 3 is automatically equipped with a Google account and if you go into setting under notification at will say beep once or vibrate once. I shut mine off just now so we will see.