Simple one-file C++ application extracting data from given PESEL number. PESEL ( pol. Powszechny Elektroniczny System Ewidencji Ludności, Universal Electronic System for Registration of the Population) is a Polish national identification number, used in Poland since 1979.

PESEL number contains:

• date of birth,
• gender,
• validity digit,
• serial number

For specific information about algorithms used to put data into a 11-digits-long string, please reffer to Wikipedia.

PESEL number is the main method of citizens identification. Each record in the database consists of 26 fields (additional 7 for foreigners) and it is assigned to every new Polish inhabitant.