What it is
The Application PAN is the cardholder account number for this application, encoded as compressed numeric (BCD) and right-padded with hex F to a whole number of bytes. It is the same PAN that appears embossed on the card and inside Track 2.
It is sensitive cardholder data; validate it with the Luhn check digit and never log it in the clear.
Where it appears
Read from the card record files (per the AFL) after GET PROCESSING OPTIONS.
Specification reference
Defined in: EMV 4.x Book 3 (Application Specification), Annex A — Data Element Dictionary
Example values
4761 7390 0101 0119A 16-digit PAN (BCD, F-padded if odd length)