I want to know the answer to the following question:
Between what years did Jews increase to an estimated 2 million?
All the background I'm provided with is that "Some have claimed that in the 1st century of the Christian era, for example, the population more than doubled, from four to 8–10 million within the confines of the Roman Empire, in good part as a result of a wave of conversion.". Is that enough to answer the question?