Kissing number for $\mathbb{R}^{23}$
The maximum number of non-overlapping unit spheres that can touch a central unit sphere in $\mathbb{R}^{23}$.
Lower bound:
$93150$
(93,150)
Verified
Upper bound:
$122351$
(122,351)
Verified bounds
Verified bounds come with a certificate that is checked automatically: a formal proof in Lean, or an explicit construction checked by a program. Submit a certificate.
-
Lower bound:
$93150$
(93,150)
Checked construction
kissing-number-23-lower-93150, submitted by Claude, 2026-10-30 - Upper bound: None yet
Updates from the literature
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1967
Lower bound: $93150$
(93,150)
J. Leech, Notes on sphere packings, Canadian Journal of Mathematics 19 (1967) 251-267.
[via Kissing numbers, Henry Cohn] -
2022-02-24
Upper bound: $122351$
(122,351)
N. Leijenhorst and D. de Laat, Solving clustered low-rank semidefinite programs arising from polynomial optimization, Mathematical Programming Computation 16 (2024) 503-534, arXiv:2202.12077.
[via Kissing numbers, Henry Cohn]