Written to the chain on 08 Apr 2013, block 230,219.
Files encrypted with GPG's CAST5 cipher, still unread. The ciphertext is public and permanent, and will stay that way unless someone produces the passphrase — a reminder that putting something on the chain forever is not the same as making it legible.
Bare multisig outputs list several public keys and say how many signatures are needed to spend them. Uploaders discovered that the public-key slots could carry arbitrary bytes. A transaction can include many such multisig outputs, each carrying one or more fake key-sized chunks.
More about P2FMSEvery byte shown here was read from these transactions. Open one in a block explorer to check it yourself.
