>>15
 x = (23-√349)/2 = 2.15923
 y = (23+√349)/2 = 20.84077
のとき
 x^{211/79} = x^2.671 = 7.814 < y,
 1.5638262…*10^104 ( ≒ y^79)

 x = (23+√349)/2 = 20.84077
 y = (23-√349)/2 = 2.15923
のとき
 1.9534722…*10^278 (≒ x^211)