https://github.com/ElementsProject/elementsproject.github.io/blame/master/features/confidential-transactions/index.md#L93-L95 The values in the referenced lines refer to old parameters, now (after https://github.com/ElementsProject/elements/pull/834 was merged) CT_BITS allow to cover the whole range of 21M expressible on Bitcoin. Also, as I understand, `min_value` for a long time was 1, allowing to blind values from 1 satoshi (https://github.com/ElementsProject/elements/blob/95602ec21f0b3ec4a58f36bbc1c53bb757c97701/src/blind.cpp#L184)