5^{255}=5^{3.85}=125^{85}=(5^{51})^5
2^{579}=8^{193}< 8^{195}=(8^{39})^5< (5^{51})^5=5^{255}
ta có:
25>210.3<=>(25)51>210.51.351=2510.351.Ve trai 2589=2510. 279. Ta chi can chung minh 351>279 thi 5255>2579. ta co:37>211=>(37)7> (211) 7=>349>277 ma 32>22=>351>279. Vay 5255> 2579
ban cong chua gia bang sai roi
de bai la 2^597 ma ban