... 3.2n - ; b = 3.2n-1 - ; c = 9 .22 n-1 - thỡ 2nab va 2nc l hai s bố bn ễng cho vớ d l hai s 28 4 v 22 0: 22 0 cú cỏc c l 1 ,2, 4,5,10,11 ,20 ,22 ,44,55,110 nhng + + + + + 11 + 20 + 22 + 44 + 55 + 110 = 22 0 ... trỡnh x3 + px = q l x1 = u + v ; x2 = ju + j2v v x3 = j2u + jv ú j = ei .2 = -ẵ + i3 /2 vi u v v l s phc cú dng : u3= -q /2 + [(p/3) + (q /2) 2] ; v3= -q /2 - [(p/3) + (q /2) 2] Karl Theodor Wilhelm WEIERSTRASS ... 89, 107, 127 , 521 , 607, 127 9, 22 03, 22 81, 321 7, 425 3, 4 423 , 9689, 9941, 1 121 3, 19937, 21 707 v Mp l hp s vi mi s nguyờn t p < 21 707 Ta hóy tng tng rng vit M 21 707 ta cn 6533 ch s Ngy nay, ta cú...