: The suffix stands for "original," indicating this is the highest resolution version available on the server. Understanding the JPEG Format
: 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)? : The suffix stands for "original," indicating this
: This is the unique ID for the Facebook post or object associated with the photo. How does JPG work and why (with an example)
: This often represents the ID of the user or page that uploaded the image.
The string of numbers is not random; it acts as a unique identifier within Facebook's content delivery network (CDN):
If you are trying to track down where this image originated, you can use these methods: