It's not mine, but I think it took a long time or maybe being a legacy address not so much, I don't know for sure, maybe I'll do some research on it 👌🏾

It is not a vanity address. It's a burn address. There is no way anyone knows the privkey of this address (pow is sooo large!)

They only had to compute checksum, it's a burn address. The privkey is not known.