How long is Facebook caching the sharing thumbnails?

Question

How long is Facebook caching the sharing thumbnails? I\'ve added a custom thumbnail for my page using:

Answer 1

Facebook images are cached on a different servers on a different location. According to what I have read, it will take 3 to 5 years before the image is refresh/deleted permanently after the last time it was accessed. So if the image keeps being accessed it won't be flushed. Not until you give up on shutting down your site.