Millisecond Forums

So, can anyone answer how long an ID number can be?  We are having participants routed from Qualtrics to IAT, but they will need to input (copy and paste) their ID number that was supplied to them by Qualtrics in the first field of the IAT on Milliseconds so we can link up the two pieces of data.  The ID number provided by Qualtrics is a little long, do you think it would work?  It appears to be 17 characters:  R_b7xEoy1vgBr4qdT