There are a lot of people who think they're ex-members but are really still on the books. Membership status does not just evaporate by itself. Unless you know you had your name officially removed from Church records, it's likely you're still a member. If so and if your MRN is connected to your Church account, you should be able to go the main Church website main page (
https://www.churchofjesuschrist.org/?lang=eng ) and click on the 3x3 dots near the upper right-hand corner of the page. Click on 'Partiarchal Blessing' and follow the instructions.
If you need your MRN to check your actual membership status, please use the Meetinghouse Locator (
https://www.churchofjesuschrist.org/maps/meetinghouses/ ) to find the phone number of the bishop for your current ward.