Best Known (138−14, 138, s)-Nets in Base 2
(138−14, 138, 74901)-Net over F2 — Constructive and digital
Digital (124, 138, 74901)-net over F2, using
- 23 times duplication [i] based on digital (121, 135, 74901)-net over F2, using
- t-expansion [i] based on digital (120, 135, 74901)-net over F2, using
- net defined by OOA [i] based on linear OOA(2135, 74901, F2, 15, 15) (dual of [(74901, 15), 1123380, 16]-NRT-code), using
- OOA 7-folding and stacking with additional row [i] based on linear OA(2135, 524308, F2, 15) (dual of [524308, 524173, 16]-code), using
- construction X applied to Ce(14) ⊂ Ce(12) [i] based on
- linear OA(2134, 524288, F2, 15) (dual of [524288, 524154, 16]-code), using an extension Ce(14) of the primitive narrow-sense BCH-code C(I) with length 524287 = 219−1, defining interval I = [1,14], and designed minimum distance d ≥ |I|+1 = 15 [i]
- linear OA(2115, 524288, F2, 13) (dual of [524288, 524173, 14]-code), using an extension Ce(12) of the primitive narrow-sense BCH-code C(I) with length 524287 = 219−1, defining interval I = [1,12], and designed minimum distance d ≥ |I|+1 = 13 [i]
- linear OA(21, 20, F2, 1) (dual of [20, 19, 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(14) ⊂ Ce(12) [i] based on
- OOA 7-folding and stacking with additional row [i] based on linear OA(2135, 524308, F2, 15) (dual of [524308, 524173, 16]-code), using
- net defined by OOA [i] based on linear OOA(2135, 74901, F2, 15, 15) (dual of [(74901, 15), 1123380, 16]-NRT-code), using
- t-expansion [i] based on digital (120, 135, 74901)-net over F2, using
(138−14, 138, 125809)-Net over F2 — Digital
Digital (124, 138, 125809)-net over F2, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OOA(2138, 125809, F2, 4, 14) (dual of [(125809, 4), 503098, 15]-NRT-code), using
- discarding factors / shortening the dual code based on linear OOA(2138, 131078, F2, 4, 14) (dual of [(131078, 4), 524174, 15]-NRT-code), using
- strength reduction [i] based on linear OOA(2138, 131078, F2, 4, 15) (dual of [(131078, 4), 524174, 16]-NRT-code), using
- OOA 4-folding [i] based on linear OA(2138, 524312, F2, 15) (dual of [524312, 524174, 16]-code), using
- 3 times code embedding in larger space [i] based on linear OA(2135, 524309, F2, 15) (dual of [524309, 524174, 16]-code), using
- construction X4 applied to Ce(14) ⊂ Ce(12) [i] based on
- linear OA(2134, 524288, F2, 15) (dual of [524288, 524154, 16]-code), using an extension Ce(14) of the primitive narrow-sense BCH-code C(I) with length 524287 = 219−1, defining interval I = [1,14], and designed minimum distance d ≥ |I|+1 = 15 [i]
- linear OA(2115, 524288, F2, 13) (dual of [524288, 524173, 14]-code), using an extension Ce(12) of the primitive narrow-sense BCH-code C(I) with length 524287 = 219−1, defining interval I = [1,12], and designed minimum distance d ≥ |I|+1 = 13 [i]
- linear OA(220, 21, F2, 19) (dual of [21, 1, 20]-code), using
- strength reduction [i] based on linear OA(220, 21, F2, 20) (dual of [21, 1, 21]-code or 21-arc in PG(19,2)), using
- dual of repetition code with length 21 [i]
- strength reduction [i] based on linear OA(220, 21, F2, 20) (dual of [21, 1, 21]-code or 21-arc in PG(19,2)), using
- linear OA(21, 21, F2, 1) (dual of [21, 20, 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(14) ⊂ Ce(12) [i] based on
- 3 times code embedding in larger space [i] based on linear OA(2135, 524309, F2, 15) (dual of [524309, 524174, 16]-code), using
- OOA 4-folding [i] based on linear OA(2138, 524312, F2, 15) (dual of [524312, 524174, 16]-code), using
- strength reduction [i] based on linear OOA(2138, 131078, F2, 4, 15) (dual of [(131078, 4), 524174, 16]-NRT-code), using
- discarding factors / shortening the dual code based on linear OOA(2138, 131078, F2, 4, 14) (dual of [(131078, 4), 524174, 15]-NRT-code), using
(138−14, 138, 2907424)-Net in Base 2 — Upper bound on s
There is no (124, 138, 2907425)-net in base 2, because
- the generalized Rao bound for nets shows that 2m ≥ 348449 273235 030296 302094 704044 424547 223936 > 2138 [i]