exponential growth, grows exponentially :) I can't find the article, but it was about extracting X(forgot which) material. And if you want just 1% yearly growt

exponential growth, grows exponentially :) I can't find the article, but it was about extracting X(forgot which) material. And if you want just 1% yearly growth. If I recall correctly once you outgrow a planet, its less than 250 years before you outgrow whole of our galaxy, and less than 500 before whole known universe.