[julia-users] What is the value of time_ns() before it wraps?

[Jeffrey Sarnoff]

The help says "Get the time in nanoseconds. The time corresponding to 0 is 
undefined, and wraps every 5.8 years." I want to know the largest UInt64 value 
that time_ns() can return: the (nonzero) value which would be followed by 
0x01%UInt64.