When you submit a link to HN it does clever things about trying to find the canonical version of a URL. Some really clever things. Unfortunately in this case

When you submit a link to HN it does clever things about trying to find the canonical version of a URL. Some really clever things. Unfortunately in this case (as it has in others) it ends up with an inaccessible page, rather than the page originally submitted, which is accessible. Here's the original link: https://mathstodon.xyz/web/@retr0id@retr0.id/109046752062665710 https://mathstodon.xyz/web/@retr0id@retr0.id/109046752062665... That should work. Here's the image: https://mathstodon.xyz/system/cache/media_attachments/files/109/046/752/045/088/609/original/6a42083ac56047ee.png https://mathstodon.xyz/system/cache/media_attachments/files/... Here's the comment: "The image in this post displays its own MD5 hash. "You can download and hash it yourself, and it should still match - 1337e2ef42b9bee8de06a4d223a51337 "I think this is the first PNG/MD5 hashquine." Perhaps it's also worth noting that the MD5 both starts and ends with "1337"