Peripherally related to: Is it safe to recycle unshredded credit card receipts?.
From some basic research, it seems as though the SEQ number is internal to the company running the POS software, the AID is the registration for that POS system, and the merchant number is related to how the processor stores things. It would seem that none of these could be exploited in and of themselves.
I realize that the actual card digits themselves have a checksum pattern to them, and as such, would be very difficult to brute force. However, using the issuer (which would give access to the first digit of the card), the last four digits, and the authorization code, could an individual access my full credit card number via a social engineering attack (or otherwise) on the payment processor using this information, via automated means or by talking to a representative?