Social Security Number (SSN)
Published on Tue Mar 01 2022
tests for valid social security numbers according to the social security administration. more specifically:
-disallows a group to have all 0s
-disallows first group to have all 6s
-disallows a ssn to begin with 9
note that this does not test for issued ssn's. that would be impossible to implement here, because the high group document is continuously updated on a monthly basis.