Best Known (220, 246, s)-Nets in Base 2
(220, 246, 20168)-Net over F2 — Constructive and digital
Digital (220, 246, 20168)-net over F2, using
- 24 times duplication [i] based on digital (216, 242, 20168)-net over F2, using
- t-expansion [i] based on digital (215, 242, 20168)-net over F2, using
- net defined by OOA [i] based on linear OOA(2242, 20168, F2, 27, 27) (dual of [(20168, 27), 544294, 28]-NRT-code), using
- OOA 13-folding and stacking with additional row [i] based on linear OA(2242, 262185, F2, 27) (dual of [262185, 261943, 28]-code), using
- discarding factors / shortening the dual code based on linear OA(2242, 262187, F2, 27) (dual of [262187, 261945, 28]-code), using
- construction X applied to Ce(26) ⊂ Ce(22) [i] based on
- linear OA(2235, 262144, F2, 27) (dual of [262144, 261909, 28]-code), using an extension Ce(26) of the primitive narrow-sense BCH-code C(I) with length 262143 = 218−1, defining interval I = [1,26], and designed minimum distance d ≥ |I|+1 = 27 [i]
- linear OA(2199, 262144, F2, 23) (dual of [262144, 261945, 24]-code), using an extension Ce(22) of the primitive narrow-sense BCH-code C(I) with length 262143 = 218−1, defining interval I = [1,22], and designed minimum distance d ≥ |I|+1 = 23 [i]
- linear OA(27, 43, F2, 3) (dual of [43, 36, 4]-code or 43-cap in PG(6,2)), using
- discarding factors / shortening the dual code based on linear OA(27, 63, F2, 3) (dual of [63, 56, 4]-code or 63-cap in PG(6,2)), using
- the primitive expurgated narrow-sense BCH-code C(I) with length 63 = 26−1, defining interval I = [0,1], and designed minimum distance d ≥ |I|+1 = 4 [i]
- discarding factors / shortening the dual code based on linear OA(27, 63, F2, 3) (dual of [63, 56, 4]-code or 63-cap in PG(6,2)), using
- construction X applied to Ce(26) ⊂ Ce(22) [i] based on
- discarding factors / shortening the dual code based on linear OA(2242, 262187, F2, 27) (dual of [262187, 261945, 28]-code), using
- OOA 13-folding and stacking with additional row [i] based on linear OA(2242, 262185, F2, 27) (dual of [262185, 261943, 28]-code), using
- net defined by OOA [i] based on linear OOA(2242, 20168, F2, 27, 27) (dual of [(20168, 27), 544294, 28]-NRT-code), using
- t-expansion [i] based on digital (215, 242, 20168)-net over F2, using
(220, 246, 43698)-Net over F2 — Digital
Digital (220, 246, 43698)-net over F2, using
- 23 times duplication [i] based on digital (217, 243, 43698)-net over F2, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OOA(2243, 43698, F2, 6, 26) (dual of [(43698, 6), 261945, 27]-NRT-code), using
- OOA 6-folding [i] based on linear OA(2243, 262188, F2, 26) (dual of [262188, 261945, 27]-code), using
- 2 times code embedding in larger space [i] based on linear OA(2241, 262186, F2, 26) (dual of [262186, 261945, 27]-code), using
- 1 times truncation [i] based on linear OA(2242, 262187, F2, 27) (dual of [262187, 261945, 28]-code), using
- construction X applied to Ce(26) ⊂ Ce(22) [i] based on
- linear OA(2235, 262144, F2, 27) (dual of [262144, 261909, 28]-code), using an extension Ce(26) of the primitive narrow-sense BCH-code C(I) with length 262143 = 218−1, defining interval I = [1,26], and designed minimum distance d ≥ |I|+1 = 27 [i]
- linear OA(2199, 262144, F2, 23) (dual of [262144, 261945, 24]-code), using an extension Ce(22) of the primitive narrow-sense BCH-code C(I) with length 262143 = 218−1, defining interval I = [1,22], and designed minimum distance d ≥ |I|+1 = 23 [i]
- linear OA(27, 43, F2, 3) (dual of [43, 36, 4]-code or 43-cap in PG(6,2)), using
- discarding factors / shortening the dual code based on linear OA(27, 63, F2, 3) (dual of [63, 56, 4]-code or 63-cap in PG(6,2)), using
- the primitive expurgated narrow-sense BCH-code C(I) with length 63 = 26−1, defining interval I = [0,1], and designed minimum distance d ≥ |I|+1 = 4 [i]
- discarding factors / shortening the dual code based on linear OA(27, 63, F2, 3) (dual of [63, 56, 4]-code or 63-cap in PG(6,2)), using
- construction X applied to Ce(26) ⊂ Ce(22) [i] based on
- 1 times truncation [i] based on linear OA(2242, 262187, F2, 27) (dual of [262187, 261945, 28]-code), using
- 2 times code embedding in larger space [i] based on linear OA(2241, 262186, F2, 26) (dual of [262186, 261945, 27]-code), using
- OOA 6-folding [i] based on linear OA(2243, 262188, F2, 26) (dual of [262188, 261945, 27]-code), using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OOA(2243, 43698, F2, 6, 26) (dual of [(43698, 6), 261945, 27]-NRT-code), using
(220, 246, 2817195)-Net in Base 2 — Upper bound on s
There is no (220, 246, 2817196)-net in base 2, because
- the generalized Rao bound for nets shows that 2m ≥ 113 078380 681757 854306 474765 742875 314498 729318 779866 176430 903805 012217 817488 > 2246 [i]