Looking for logging into the Salesforce Production site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Salesforce Production site. After that you can login as usual with your login credentials.
https://login.salesforce.com/
https://www.salesforce.com/
https://success.salesforce.com/answers%3Fid%3D9063A000000e92NQAQ
https://help.salesforce.com/apex/HTViewSolution%3Furlname%3DEnabling-Organization-Admins-Can-Login-as-Any-User
https://developer.salesforce.com/forums/%3Fid%3D906F00000008sRrIAI
https://help.salesforce.com/HTViewHelpDoc%3Fid%3Dusers_login_history.htm
https://help.salesforce.com/apex/HTViewHelpDoc%3Fid%3Dlogging_in_as_another_user.htm%26language%3Den
https://success.salesforce.com/ideaView%3Fid%3D0873A000000CPZyQAO
https://trailhead.salesforce.com/en/content/learn/modules/identity_login/identity_login_my_domain
https://help.salesforce.com/htviewsolution%3Fid%3D000175987
https://help.salesforce.com/apex/HTViewSolution%3Fid%3D000005648%26language%3Den_US
https://help.salesforce.com/apex/HTViewSolution%3Fid%3D000003910
https://help.salesforce.com/HTViewSolution%3Fid%3D000232622