Repeated flushing will not get rid of that turd which is so large it wont go down the loo after several attempts. It needs time to soak before its ready to be dispatched, but who likes to find poo floating in a loo?
The decent and well mannered thing to do is to lay a large piece of toilet paper, a "Coroner's cloth" over said turd, giving it time and dignity while it decomposes, before being flushed by the next user.
Who left this huge floater in here? They could have at least left a Coroner's cloth over it.