At 5 parts in 10^20, the frequencies measured in this work will no longer be representable with an unsigned 64-bit int. They're at 2 parts in 10^17 now. Less t

At 5 parts in 10^20, the frequencies measured in this work will no longer be representable with an unsigned 64-bit int. They're at 2 parts in 10^17 now. Less than a factor of 1000 to go!