Enigma? Googled it. Still don't know what it is.

You're now chatting with a random stranger. Say hi!
You: hi
Stranger: 978-979-1227-86-5
Stranger: decode this with enigma
Stranger: 978-979-1227-86-5
Stranger: 978-979-1227-86-5
Stranger: 978-979-1227-86-5
Stranger: 978-979-1227-86-5
Stranger: 978-979-1227-86-5
Stranger: 978-979-1227-86-5
You: enigma?
Stranger: 978-979-1227-86-5
Stranger: 978-979-1227-86-5
You: what?
Stranger: yeah you know
Stranger: its machine
You: I'm disconnecting because I care
You have disconnected.