The first 5 digits are directly correlated to DOB and birthplace, the last 4 are mostly random. https://www.pnas.org/content/106/27/10975 https://www.pnas.org/c

The first 5 digits are directly correlated to DOB and birthplace, the last 4 are mostly random. https://www.pnas.org/content/106/27/10975 https://www.pnas.org/content/106/27/10975 There's a pretty interesting study done on this.