If anyone is curious, here's Gauss's book [1] that contains the theorem. It is in Latin (Gauss published only in Latin), and you can find it at the bottom of pa

If anyone is curious, here's Gauss's book [1] that contains the theorem. It is in Latin (Gauss published only in Latin), and you can find it at the bottom of page 24. And here's the English translation [2]. The theorem is on page 20. [1] https://books.google.com/books?id=bX0AAAAAMAAJ https://books.google.com/books?id=bX0AAAAAMAAJ [2] https://books.google.com/books?id=a1wTJR3kHwUC https://books.google.com/books?id=a1wTJR3kHwUC