Threads/(number) without title crawled and indexed?

[dutchbb]

I noticed google and bing sometimes crawl and index -> /threads/379684/

I have no idea where they get the url format because it is not on the forum like that, should be -> /threads/(title).379684/

 

[dutchbb]

Found it, this is because of old forum (vBulletin) redirects.

https://xenforo.com/community/threads/xenforo-indexing-confusion-problem.127803/

 

[Mike]

Note that these URLs 301. In many cases, the actual processing of the 301 redirect may be separate from when the URL itself is seen.