Best Known (40, 40+21, s)-Nets in Base 64
(40, 40+21, 26214)-Net over F64 — Constructive and digital
Digital (40, 61, 26214)-net over F64, using
- net defined by OOA [i] based on linear OOA(6461, 26214, F64, 21, 21) (dual of [(26214, 21), 550433, 22]-NRT-code), using
- OOA 10-folding and stacking with additional row [i] based on linear OA(6461, 262141, F64, 21) (dual of [262141, 262080, 22]-code), using
- discarding factors / shortening the dual code based on linear OA(6461, 262144, F64, 21) (dual of [262144, 262083, 22]-code), using
- an extension Ce(20) of the primitive narrow-sense BCH-code C(I) with length 262143 = 643−1, defining interval I = [1,20], and designed minimum distance d ≥ |I|+1 = 21 [i]
- discarding factors / shortening the dual code based on linear OA(6461, 262144, F64, 21) (dual of [262144, 262083, 22]-code), using
- OOA 10-folding and stacking with additional row [i] based on linear OA(6461, 262141, F64, 21) (dual of [262141, 262080, 22]-code), using
(40, 40+21, 99772)-Net over F64 — Digital
Digital (40, 61, 99772)-net over F64, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OOA(6461, 99772, F64, 2, 21) (dual of [(99772, 2), 199483, 22]-NRT-code), using
- discarding factors / shortening the dual code based on linear OOA(6461, 131073, F64, 2, 21) (dual of [(131073, 2), 262085, 22]-NRT-code), using
- OOA 2-folding [i] based on linear OA(6461, 262146, F64, 21) (dual of [262146, 262085, 22]-code), using
- discarding factors / shortening the dual code based on linear OA(6461, 262147, F64, 21) (dual of [262147, 262086, 22]-code), using
- construction X applied to Ce(20) ⊂ Ce(19) [i] based on
- linear OA(6461, 262144, F64, 21) (dual of [262144, 262083, 22]-code), using an extension Ce(20) of the primitive narrow-sense BCH-code C(I) with length 262143 = 643−1, defining interval I = [1,20], and designed minimum distance d ≥ |I|+1 = 21 [i]
- linear OA(6458, 262144, F64, 20) (dual of [262144, 262086, 21]-code), using an extension Ce(19) of the primitive narrow-sense BCH-code C(I) with length 262143 = 643−1, defining interval I = [1,19], and designed minimum distance d ≥ |I|+1 = 20 [i]
- linear OA(640, 3, F64, 0) (dual of [3, 3, 1]-code), using
- discarding factors / shortening the dual code based on linear OA(640, s, F64, 0) (dual of [s, s, 1]-code) with arbitrarily large s, using
- construction X applied to Ce(20) ⊂ Ce(19) [i] based on
- discarding factors / shortening the dual code based on linear OA(6461, 262147, F64, 21) (dual of [262147, 262086, 22]-code), using
- OOA 2-folding [i] based on linear OA(6461, 262146, F64, 21) (dual of [262146, 262085, 22]-code), using
- discarding factors / shortening the dual code based on linear OOA(6461, 131073, F64, 2, 21) (dual of [(131073, 2), 262085, 22]-NRT-code), using
(40, 40+21, large)-Net in Base 64 — Upper bound on s
There is no (40, 61, large)-net in base 64, because
- 19 times m-reduction [i] would yield (40, 42, large)-net in base 64, but