[IanCal]

If it's 1.4T it depends on what you're using it for. Someone on SO has a verify speed for 512 bit rsa keys at 350k/second which would leave it at I think a month and a half to run 1.4T. That's a random user and a single machine. ECDSA 128 bit verify maybe 6k/s on a single core of a not-great CPU. That puts you about a month or two of a moderate machine assuming there's no fancy gpu things for doing it.

[dist-epoch]

These are symmetric keys - AES, not ECDSA. Much faster to test.