Best Known (47, 47+24, s)-Nets in Base 25
(47, 47+24, 1302)-Net over F25 — Constructive and digital
Digital (47, 71, 1302)-net over F25, using
- 251 times duplication [i] based on digital (46, 70, 1302)-net over F25, using
- net defined by OOA [i] based on linear OOA(2570, 1302, F25, 24, 24) (dual of [(1302, 24), 31178, 25]-NRT-code), using
- OA 12-folding and stacking [i] based on linear OA(2570, 15624, F25, 24) (dual of [15624, 15554, 25]-code), using
- discarding factors / shortening the dual code based on linear OA(2570, 15625, F25, 24) (dual of [15625, 15555, 25]-code), using
- an extension Ce(23) of the primitive narrow-sense BCH-code C(I) with length 15624 = 253−1, defining interval I = [1,23], and designed minimum distance d ≥ |I|+1 = 24 [i]
- discarding factors / shortening the dual code based on linear OA(2570, 15625, F25, 24) (dual of [15625, 15555, 25]-code), using
- OA 12-folding and stacking [i] based on linear OA(2570, 15624, F25, 24) (dual of [15624, 15554, 25]-code), using
- net defined by OOA [i] based on linear OOA(2570, 1302, F25, 24, 24) (dual of [(1302, 24), 31178, 25]-NRT-code), using
(47, 47+24, 10573)-Net over F25 — Digital
Digital (47, 71, 10573)-net over F25, using
- embedding of OOA with Gilbert–Varšamov bound [i] based on linear OA(2571, 10573, F25, 24) (dual of [10573, 10502, 25]-code), using
- discarding factors / shortening the dual code based on linear OA(2571, 15632, F25, 24) (dual of [15632, 15561, 25]-code), using
- construction X applied to Ce(23) ⊂ Ce(21) [i] based on
- linear OA(2570, 15625, F25, 24) (dual of [15625, 15555, 25]-code), using an extension Ce(23) of the primitive narrow-sense BCH-code C(I) with length 15624 = 253−1, defining interval I = [1,23], and designed minimum distance d ≥ |I|+1 = 24 [i]
- linear OA(2564, 15625, F25, 22) (dual of [15625, 15561, 23]-code), using an extension Ce(21) of the primitive narrow-sense BCH-code C(I) with length 15624 = 253−1, defining interval I = [1,21], and designed minimum distance d ≥ |I|+1 = 22 [i]
- linear OA(251, 7, F25, 1) (dual of [7, 6, 2]-code), using
- discarding factors / shortening the dual code based on linear OA(251, s, F25, 1) (dual of [s, s−1, 2]-code) with arbitrarily large s, using
- construction X applied to Ce(23) ⊂ Ce(21) [i] based on
- discarding factors / shortening the dual code based on linear OA(2571, 15632, F25, 24) (dual of [15632, 15561, 25]-code), using
(47, 47+24, large)-Net in Base 25 — Upper bound on s
There is no (47, 71, large)-net in base 25, because
- 22 times m-reduction [i] would yield (47, 49, large)-net in base 25, but