For You. ic apex 20ke fpga 200k 484-fbga

Good day everyone that frequents this forum. I have two questions that I hope someone can answer.

1. Altera Part# EP20K200EFC484-1N. What does the "N" mean?

Not that I understand much of any of the part number, but I can't find the exact part number that includes the "N"

2. I have 150 pcs. Unopened with a date code of 0610, Anyone buying?

Email: Tyrant5150@cox.net