オイラー予想
27 + 84 + 110 + 133 = 144 (Lander & Parkin, 1966)
19 + 43 + 46 + 47 + 67 = 72 (Lander, Parkin, Selfridge, smallest, 1967)
21 + 23 + 37 + 79 + 84 = 94 (Lander, Parkin, Selfridge, second smallest, 1967)
7 + 43 + 57 + 80 + 100 = 107 (Sastry, 1934, third smallest)