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        "median_seconds": 0.21372148899990862,
        "mean_seconds": 0.214191298333238,
        "stdev_seconds": 0.0009354716680464318,
        "candidates_per_second": 233949329.2601072,
        "raw_seconds": [
          0.21372148899990862,
          0.2154972399998769,
          0.21335516599992843
        ]
      },
      "best_dual": {
        "limit": 50000000,
        "threads": 2,
        "segment_size": 16384,
        "prime_count": 3001134,
        "repeats": 3,
        "median_seconds": 0.11409506300014982,
        "mean_seconds": 0.11407793733337712,
        "stdev_seconds": 0.00020330894611530678,
        "candidates_per_second": 438231047.735469,
        "raw_seconds": [
          0.11409506300014982,
          0.11431793399992785,
          0.1138208150000537
        ]
      },
      "dual_thread_speedup": 1.873187878424047
    }
  ],
  "hypothesis": "The best chunk size and benefit of two threads may depend on workload scale.",
  "limitations": [
    "Results characterize this host and this segmented-sieve workload only.",
    "Three repeats per configuration are an initial estimate.",
    "No inference about LLM performance should be drawn from sieve performance."
  ]
}