personnummer-forth

personnummer-forth is a Forth stand-alone command line app for validating Swedish personnummer (personal identity numbers).

Usage: gforth main.fs [PERSONNUMMER]... -e bye

Features

• Verifies the checksum digit (Luhn algorithm).
• Date validation
• Century validation

Input format

Format: ccYYmmDDXXXC, for example: 202511142388

• cc - Century (18-20). Not used by checksum algorithm.
• YY - Year 00-99
• MM - Month 01-12
• C - Checksum digit

Requirements

• gforth 0.7.3 or higher
• bash (tests only)

Tests

Run unit tests: ./test.sh

All test data is from Skatteverket (testpersonnummer).

Licence

GPL-3 only

References

• Personal identity number
• Skatteverket testpersonnummer