Tinnstaffl has (as usual) nailed it, Tick Tock got close, Pilot Mike made some pompous statements, and was wrong!!
Tick Tock, best range would be at Best L/D (Which IS co-incident with Minimum Drag) IF power was equal at all speeds. It isn't. Hence we have a power curve. Best range occurs at Maximum Excess Power, max endurence at Maximum Excess Thrust.