Is it its first shed, my hatchlings macs had their first at 10days (8 of them within 24hours of each other), 2nd shed around 5 weeks, though I have one that hasn't fed and only shed once.
They all vary, (unless is has retained some, nothing to worry about) just make sure that there is enough humidity in the tank (put water bowl under/over heat source) and keep an eye out for blue/cloudy eyes and skin and in the next week or so they should shed.