for another example, the greatest number that could be represented with six digits would be 543210! not long afterward a developer had a vision for a community of larger-lot homes built around a golf course. the visitor center has exhibits which explain the fort's history. there are estimated to be over 150 such objects around the country. the age minimum age for participation was lowered to 17 for the 2006 season. for privately owned beaches in the united states, some states such as massachusetts use the low water mark as the dividing line between the property of the state and that of the beach owner. 