generating lowes coupons

Go to this link:
https://slickdeals.net/f/9549456-lowe-s-10-15-50-off-online-coupons-sharing-only-no-off-topic
and find out current underlined 4 digit code for your desired coupon. For example, in coupon code 470001634871214, 7121 is the 4 digit code.

Then paste the following into Excel:
=47000 & TEXT(RANDBETWEEN(0,50000),"00000") & ****
Where **** is current 4 digit number from above step.

Then select a couple generated codes in excel, and go to this site:
http://www.morovia.com/bulk-check-digit-calculation/index.php
Paste the codes (one on each line) into the "numbers" field on the website, and click submit. The site generates the last digit of the code for you.

Go to Lowes.com, and try each code one by one into until one works. Latest expiration from the first step yields the most usable codes.