Log Message:
Added finance/p5-Algorithm-LUHN version 1.00

This module calculates the Modulus 10 Double Add Double checksum,
also known as the LUHN Formula. This algorithm is used to verify
credit card numbers and Standard & Poor's security identifiers such
as CUSIP's and CSIN's.

You can find plenty of information about the algorithm by searching
the web for "modulus 10 double add double".