: Theoretically, the middle set of numbers can sometimes be used to find the original post by appending it to facebook.com/ . However, privacy settings often block this.
: This is the unique ID for the specific image file. 17859053_1254964121291776_570026879_o.jpg
: Right-clicking the file and selecting Properties > Details (Windows) or Get Info (Mac) may reveal "EXIF" data, such as the date the photo was taken or the camera model used. How does JPG work and why (with an example)? : Theoretically, the middle set of numbers can
: This often represents the ID of the user or page that uploaded the image. 17859053_1254964121291776_570026879_o.jpg
: This is the unique ID for the Facebook post or object associated with the photo.
