IF (and that's a big if) that's true then it means they can factorize number into primes with this quantum computer and break encryption.
No, this quantum computer cannot factorize the large composite numbers that we use for modern RSA. Even for the numbers that it can factor, I don't think it will be faster than a decent classical computer.
No, that's not what that means.
Not sure what you mean by the "that" when you say "if that's true", but there is nothing in this thread or by google that is anywhere close to breaking encryption.