Retrieving headlines from secondary blogs

I am designing a site built on WordPress and I have the WP files installed at https://www.domainname.com/main. Everything is working fine. There are going to be some separate blogs and I have installed a test blog at https://www.domainname.com/blog1. I configured the wp-config file for that blog to point to the same database, but create tables with a different prefix. A solution I found on the WP site for installing multiple blogs.

The secondary blog is working fine, but I want to pull the newest headline (hopefully with permalink) to the pages of the main blog. I have been completely unsuccessful so far. Can anybody please give me some ideas or point me to a resource online for doing such a thing. I figured it would be pretty simple to just pull the newest post_title from the blog1_posts table.

Thanks.