The Nexus Factory Images are out and the OTAs are scheduled to begin distribution sometime today. That means it's time for a huge AOSP code drop. Google is in the process of uploading Android 6.0 Marshmallow and its first official build MRA58K to the Android Open Source Project. Coincidentally, there are a handful of Android 5.1.1 updates (r19 through r24) making an appearance, no doubt to fulfill the monthly security update for October.

This is a major version release, so there's quite a bit of code to upload and that's going to take quite a while. Depending on how much has to be uploaded, it may not be done until late tonight or even tomorrow. The security updates shouldn't have a significant impact, but it may be a while before we can create a full changelog. We'll update this post when it looks like Google is finished with the upload.