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  "d": 6,
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   "value": 6,
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 "provenance": {
  "authors": [
   "Liangdong Lu",
   "Guanmin Guo",
   "Yang Liu",
   "Ruipan Yang",
   "@mathysrennela"
  ],
  "construction": "Cyclic bicycle over F_2[Z_21], with circulant supports a=[1, 3, 5, 6, 7, 9, 12, 13, 14, 16, 17, 19] and b=[1, 2, 4, 6, 11, 12, 13, 14, 15, 18, 19, 20], from Table III of arXiv:2608.09115v1.",
  "references": [
   "arXiv:2608.09115"
  ],
  "date": "2026-08-10",
  "notes": "The paper reports exact d=6. This staged record keeps the repository's witness-backed distance evidence as upper_bound until trusted certification.",
  "model": "GPT-5.6 Luna",
  "origin": "submission",
  "novelty": "known_parameters"
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 "family": "generalized-bicycle"
}