Linear OA(5⁸⁰, 648, F₅, 24) (dual of [648, 568, 25]-code), using 567 step VarÅ¡amov–Edel lengthening with (r_i) = (6, 2, 2, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 1, 4 times 0, 1, 0, 0, 0, 1, 4 times 0, 1, 5 times 0, 1, 5 times 0, 1, 5 times 0, 1, 6 times 0, 1, 7 times 0, 1, 7 times 0, 1, 8 times 0, 1, 9 times 0, 1, 9 times 0, 1, 10 times 0, 1, 11 times 0, 1, 12 times 0, 1, 13 times 0, 1, 14 times 0, 1, 16 times 0, 1, 16 times 0, 1, 18 times 0, 1, 19 times 0, 1, 21 times 0, 1, 23 times 0, 1, 24 times 0, 1, 26 times 0, 1, 29 times 0, 1, 30 times 0, 1, 33 times 0, 1, 36 times 0, 1, 38 times 0, 1, 41 times 0) based on linear OA(5²⁴, 25, F₅, 24) (dual of [25, 1, 25]-code or 25-arc in PG(23,5)), using

• dual of repetition code with length 25 [i]