{
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 "name": "[[152,42,8]] pair-partition CPM CSS code (weight-8)",
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 "provenance": {
  "authors": [
   "Lee, Jong Yeon"
  ],
  "origin": "baseline",
  "construction": "Cyclic all-one pair-partition CPM CSS construction (arXiv:2607.14091), instance PPS152_n152_k42_d8 (internal id j3l8_p19_00016): lift size p=19, (J,L)=(3,8), n=8*p=152, 3*p=57 checks per side, column weight 3, row weight 8. CPM exponent arrays (rows = CPM block-rows, columns = the 8 block-columns): E_X = [[0, 0, 0, 0, 0, 0, 0, 0], [0, 10, 9, 3, 7, 1, 18, 15], [0, 12, 17, 14, 8, 16, 13, 6]], E_Z = [[0, 15, 8, 4, 8, 0, 4, 15], [0, 1, 2, 6, 0, 1, 2, 6], [0, 6, 16, 7, 7, 16, 6, 0]]. Lift convention per the authors' expand_and_verify_cpm_matrices.py (github.com/kasaikenta/pair-partition-cpm-css-codes @ 9c2a6f2): check a of block-row b on side S has support {8*((a - E_S[b][t]) mod 19) + t : t=0..7}. Source file https://kasai.ict.eng.isct.ac.jp/pair_partition_cpm_css_codes_data/contributed_codes/jong_yeon_lee/codes/PPS152_n152_k42_d8.cpm (sha256 2c0b11059910a4353a746713100720db0e73214abcdd204973206d5af954a897), expanded with the authors' own script.",
  "date": "2026",
  "references": [
   "arXiv:2607.14091"
  ],
  "novelty": "known_parameters",
  "notes": "Literature baseline, seeded 2026-08-14. Listed as PPS152 [[152,42,8]] in the contributed-codes section (Jong Yeon Lee, 19 CPM-PP codes) of the Okada-Kasai pair-partition CPM catalogue (arXiv:2607.14091; catalogue page updated 2026-08-13), which reports the distance as exact. No public machine-verified distance certificate bundle covers this instance (checked master_manifest.json of certificate_bundles_20260805), so it is recorded here strictly as a witness-backed upper bound from this repo's own 200000-trial RIS search per side (seed 11). Reproduction was validated end to end: the published .cpm file expanded with the authors' own script gives a CSS-orthogonal regular pair with the claimed k."
 },
 "family": "pair-partition-cpm"
}