title: Can I fit a C# Guid inside a Dynamo Numeric Type?
body: <p>I want to do this because I'm assuming guids are rare enough that collisions won't be a problem; and the table I'm using already has N.  DynamoDB documentation claims that you can store up to 38 bits of precision in an N field.  But it seems that the BigInteger version of guids runs up to 2**127-1, which has 39 digits of precision.  How can I do this?</p>
  
  <p>A backup plan would be to convert the N field to string, but I would not like to modify the schema.</p>