Best Known (68−9, 68, s)-Nets in Base 2
(68−9, 68, 16388)-Net over F2 — Constructive and digital
Digital (59, 68, 16388)-net over F2, using
- 22 times duplication [i] based on digital (57, 66, 16388)-net over F2, using
- net defined by OOA [i] based on linear OOA(266, 16388, F2, 9, 9) (dual of [(16388, 9), 147426, 10]-NRT-code), using
- appending kth column [i] based on linear OOA(266, 16388, F2, 8, 9) (dual of [(16388, 8), 131038, 10]-NRT-code), using
- OOA 4-folding and stacking with additional row [i] based on linear OA(266, 65553, F2, 9) (dual of [65553, 65487, 10]-code), using
- construction X applied to Ce(8) ⊂ Ce(6) [i] based on
- linear OA(265, 65536, F2, 9) (dual of [65536, 65471, 10]-code), using an extension Ce(8) of the primitive narrow-sense BCH-code C(I) with length 65535 = 216−1, defining interval I = [1,8], and designed minimum distance d ≥ |I|+1 = 9 [i]
- linear OA(249, 65536, F2, 7) (dual of [65536, 65487, 8]-code), using an extension Ce(6) of the primitive narrow-sense BCH-code C(I) with length 65535 = 216−1, defining interval I = [1,6], and designed minimum distance d ≥ |I|+1 = 7 [i]
- linear OA(21, 17, F2, 1) (dual of [17, 16, 2]-code), using
- discarding factors / shortening the dual code based on linear OA(21, s, F2, 1) (dual of [s, s−1, 2]-code) with arbitrarily large s, using
- construction X applied to Ce(8) ⊂ Ce(6) [i] based on
- OOA 4-folding and stacking with additional row [i] based on linear OA(266, 65553, F2, 9) (dual of [65553, 65487, 10]-code), using
- appending kth column [i] based on linear OOA(266, 16388, F2, 8, 9) (dual of [(16388, 8), 131038, 10]-NRT-code), using
- net defined by OOA [i] based on linear OOA(266, 16388, F2, 9, 9) (dual of [(16388, 9), 147426, 10]-NRT-code), using
(68−9, 68, 21335)-Net over F2 — Digital
Digital (59, 68, 21335)-net over F2, using
- net defined by OOA [i] based on linear OOA(268, 21335, F2, 9, 9) (dual of [(21335, 9), 191947, 10]-NRT-code), using
- appending kth column [i] based on linear OOA(268, 21335, F2, 8, 9) (dual of [(21335, 8), 170612, 10]-NRT-code), using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OOA(268, 21335, F2, 3, 9) (dual of [(21335, 3), 63937, 10]-NRT-code), using
- discarding factors / shortening the dual code based on linear OOA(268, 21852, F2, 3, 9) (dual of [(21852, 3), 65488, 10]-NRT-code), using
- OOA 3-folding [i] based on linear OA(268, 65556, F2, 9) (dual of [65556, 65488, 10]-code), using
- 2 times code embedding in larger space [i] based on linear OA(266, 65554, F2, 9) (dual of [65554, 65488, 10]-code), using
- construction X4 applied to Ce(8) ⊂ Ce(6) [i] based on
- linear OA(265, 65536, F2, 9) (dual of [65536, 65471, 10]-code), using an extension Ce(8) of the primitive narrow-sense BCH-code C(I) with length 65535 = 216−1, defining interval I = [1,8], and designed minimum distance d ≥ |I|+1 = 9 [i]
- linear OA(249, 65536, F2, 7) (dual of [65536, 65487, 8]-code), using an extension Ce(6) of the primitive narrow-sense BCH-code C(I) with length 65535 = 216−1, defining interval I = [1,6], and designed minimum distance d ≥ |I|+1 = 7 [i]
- linear OA(217, 18, F2, 17) (dual of [18, 1, 18]-code or 18-arc in PG(16,2)), using
- dual of repetition code with length 18 [i]
- linear OA(21, 18, F2, 1) (dual of [18, 17, 2]-code), using
- discarding factors / shortening the dual code based on linear OA(21, s, F2, 1) (dual of [s, s−1, 2]-code) with arbitrarily large s, using
- construction X4 applied to Ce(8) ⊂ Ce(6) [i] based on
- 2 times code embedding in larger space [i] based on linear OA(266, 65554, F2, 9) (dual of [65554, 65488, 10]-code), using
- OOA 3-folding [i] based on linear OA(268, 65556, F2, 9) (dual of [65556, 65488, 10]-code), using
- discarding factors / shortening the dual code based on linear OOA(268, 21852, F2, 3, 9) (dual of [(21852, 3), 65488, 10]-NRT-code), using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OOA(268, 21335, F2, 3, 9) (dual of [(21335, 3), 63937, 10]-NRT-code), using
- appending kth column [i] based on linear OOA(268, 21335, F2, 8, 9) (dual of [(21335, 8), 170612, 10]-NRT-code), using
(68−9, 68, 243946)-Net in Base 2 — Upper bound on s
There is no (59, 68, 243947)-net in base 2, because
- 1 times m-reduction [i] would yield (59, 67, 243947)-net in base 2, but
- the generalized Rao bound for nets shows that 2m ≥ 147 574000 412442 968178 > 267 [i]