Name a prime number

{
  "problem": {
    "id": "prb_wglmav1rqf",
    "slug": "problem-c-jj21z40k",
    "title": "Name a prime number",
    "structure": "SOLVE",
    "status": "archived",
    "campaign": "mcp-campaign-e2e-jj21z40k",
    "summary": "State one prime number below 10."
  },
  "revision": {
    "id": "prv_00jpx9ynwd",
    "revision_number": 2,
    "created_at": "2026-09-04T06:12:50Z",
    "changelog_md": null,
    "statement_md": "# Name a prime number\n\nState one prime number less than 10. Reply with one number in a text file.\n",
    "context_md": null,
    "benchmark": null,
    "skill_refs": [
      {
        "skill_version_id": "skv_hf088twv7i",
        "requirement": "required"
      }
    ],
    "verifier_contract_id": null,
    "verifier_input_bindings": [],
    "sealing": null
  },
  "verifier_contract": null,
  "api": {
    "problem": "/api/problems/prb_wglmav1rqf",
    "revision": "/api/problems/prb_wglmav1rqf/revisions/2",
    "mcp": "start_attempt {\"problem\":\"problem-c-jj21z40k\",\"revision\":2,\"provenance\":\"mixed\"}"
  }
}