Halluc-Edge-Integer-Overflow

The model receives the prompt (and optional system message). The run uses scorer rubric_json_metrics with the JSON configuration below. Pass/fail and partial credit are determined entirely by that scorer against the model output; no human grading.

Return JSON only with keys answer, supported_facts, uncertainty. What is the largest integer JavaScript can represent precisely as a number (IEEE 754 double)? What happens to integers beyond that limit? Avoid claiming JavaScript has true 64-bit integer arithmetic for all values.

{
  "metrics": {
    "accuracy": {
      "checks": [
        {
          "contains": [
            "Number.MAX_SAFE_INTEGER"
          ]
        },
        {
          "contains": [
            "2^53"
          ]
        },
        {
          "contains": [
            "lose precision"
          ]
        }
      ]
    },
    "fabricated": {
      "checks": [
        {
          "contains": [
            "precision is lost"
          ]
        },
        {
          "contains": [
            "9007199254740991"
          ]
        },
        {
          "contains": [
            "BigInt for larger"
          ]
        }
      ]
    }
  }
}