Question on nodetool ring

[Mark]

I'm running a 2 node cluster and when I run nodetool ring I get the 
following output

Address         Status State   Load            Token
                                       
160032583171087979418578389981025646900
127.0.0.1  Up     Normal  42.28 MB        
42909338385373526599163667549814010691
127.0.0.2   Up     Normal  42.26 MB        
160032583171087979418578389981025646900

The columns/values are pretty much self explanatory except for the first 
line. What is this value?

Thanks