Starting from ground level with the graduation of Atomic University’s Class of 2018, strings of Au atoms (diameter = 288 pm) are to be bonded to one another in a vertical fashion until the top of the campus flagpole is reached. As a rite of passage, each graduate from an average class of 225 graduates is allowed to add one string containing exactly 10,000,000 Au atoms at the end of each commencement. Which graduating class will have the honor of reaching the top of the flagpole first?