Linear OA(3¹⁴¹, 831, F₃, 33) (dual of [831, 690, 34]-code), using 91 step VarÅ¡amov–Edel lengthening with (r_i) = (3, 1, 0, 1, 0, 1, 0, 0, 0, 1, 5 times 0, 1, 8 times 0, 1, 10 times 0, 1, 14 times 0, 1, 18 times 0, 1, 21 times 0) based on linear OA(3¹²⁹, 728, F₃, 33) (dual of [728, 599, 34]-code), using

• the primitive narrow-sense BCH-code C(I) with length 728 = 3⁶−1, defining interval I = [1,33], and designed minimum distance d ≥ |I|+1 = 34 [i]