> - SSN:s have a long and a short form; the short form which cuts off century information can be the same for someone who is 5 years old and someone who is 105

> - SSN:s have a long and a short form; the short form which cuts off century information can be the same for someone who is 5 years old and someone who is 105 years old. We don't do that. instead, we shove that extra bit of information into the digit following the last two digits through a table: https://da.wikipedia.org/wiki/CPR-nummer#Under_eller_over_100_%C3%A5r https://da.wikipedia.org/wiki/CPR-nummer#Under_eller_over_10...