I'm not the person you were replying to, but this [1] stack exchange answer provides an explanation. I'm not qualified to say whether it is correct though. [1]

I'm not the person you were replying to, but this [1] stack exchange answer provides an explanation. I'm not qualified to say whether it is correct though. [1] https://crypto.stackexchange.com/questions/35137/how-many-qubits-are-required-to-break-rsa-2048-or-4096-with-a-universal-quantum https://crypto.stackexchange.com/questions/35137/how-many-qu...