User blog comment:Callofduty4/Black Ops II will be Non-Linear and a Sandbox game/@comment-4073118-20120503011030/@comment-1263839-20120509054305

The numbers were Mason's code word when he was brainwashed in Vorkuta. They would tell him to kill JFK. The numbers were also the code word of all of the sleeper agents in the US (apparently) to detonate Nova 6.