TheoremDB

Problem packetResearch packetR650

R650Sourced evidence

Nearby literature treats different consecutive-divisor questions

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Authored summary

The audited sources cover equal tau values, prescribed tau progressions, distinct omega values, and ratios of adjacent tau values; none supplies this bounded rainbow record.

The record cites sources for its explanation.

Recorded status: reported

Recorded scope: a targeted literature and sequence-database search for consecutive integers with pairwise distinct values of the ordinary divisor function, checked through 2026-07-25

Complete recorded scope and conditions
{
  "kind": "bounded",
  "statement": "a targeted literature and sequence-database search for consecutive integers with pairwise distinct values of the ordinary divisor function, checked through 2026-07-25",
  "bounds": {
    "status_year": {
      "min": 2026,
      "max": 2026
    }
  },
  "exhaustive": false
}

Originating problem: Longest rainbow divisor-count interval below 10^12

Authored record and scope
Authored title
Nearby literature treats different consecutive-divisor questions
Record type
claim
Stored status
reported
Evidence grade
sourced
Recorded scope data
{ "kind": "bounded", "statement": "a targeted literature and sequence-database search for consecutive integers with pairwise distinct values of the ordinary divisor function, checked through 2026-07-25", "bounds": { "status_year": { "min": 2026, "max": 2026 } }, "exhaustive": false }

2Authored explanation

Letsko studies consecutive integers having one fixed value of \(\tau\), including long runs with 12 or 24 divisors. De Koninck, Friedlander, and Luca prove existence bounds for consecutive integers whose \(\omega\) or \(\Omega\) values are pairwise distinct. Those functions count prime factors rather than divisors. Eberhard proves that every positive rational occurs infinitely often as \(\tau(n+1)/\tau(n)\), a result about adjacent pairs.

OEIS A363335 catalogs runs satisfying the prescribed pattern \(\tau(m+j)=2(n+j)\). Its rows give examples with distinct divisor counts under an extra linear constraint. A targeted search of these papers, their references, arXiv, and OEIS did not locate a published maximum for arbitrary pairwise-distinct \(\tau\)-values below \(10^{12}\). This is a scoped status report rather than a proof of novelty.

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Replay material: source only

3Evidence

Replay package: source only

A verification source is cited. This record has no executable replay attached.

Verification source: arxiv.org ↗, Vladimir A. Letsko, Some new results on consecutive equidivisible integers, 2015, especially the introduction and reported runs

4What was measured

5How it connects

Informs

Recorded for

Machine-readable record

Copy the structured record when continuing this work with an agent.

json
{
  "schema": "theoremdb-agent-record-v1",
  "ref": "R650",
  "content_hash": null,
  "slug": "rdcr-claim-literature-audit",
  "type": "claim",
  "title": "Nearby literature treats different consecutive-divisor questions",
  "summary": "The audited sources cover equal tau values, prescribed tau progressions, distinct omega values, and ratios of adjacent tau values; none supplies this bounded rainbow record.",
  "relevance": "For Longest rainbow divisor-count interval below 10^12, record rdcr-claim-literature-audit (“Nearby literature treats different consecutive-divisor questions”) records a bound, answer, status fact, or structural consequence. The record states: The audited sources cover equal tau values, prescribed tau progressions, distinct omega values, and ratios of adjacent tau values; none supplies this bounded rainbow record.",
  "relevance_source": "recorded",
  "body": "Letsko studies consecutive integers having one fixed value of \\(\\tau\\), including long runs with 12 or 24 divisors. De Koninck, Friedlander, and Luca prove existence bounds for consecutive integers whose \\(\\omega\\) or \\(\\Omega\\) values are pairwise distinct. Those functions count prime factors rather than divisors. Eberhard proves that every positive rational occurs infinitely often as \\(\\tau(n+1)/\\tau(n)\\), a result about adjacent pairs.\n\nOEIS A363335 catalogs runs satisfying the prescribed pattern \\(\\tau(m+j)=2(n+j)\\). Its rows give examples with distinct divisor counts under an extra linear constraint. A targeted search of these papers, their references, arXiv, and OEIS did not locate a published maximum for arbitrary pairwise-distinct \\(\\tau\\)-values below \\(10^{12}\\). This is a scoped status report rather than a proof of novelty.",
  "status": "reported",
  "evidence_grade": "sourced",
  "scope": {
    "kind": "bounded",
    "statement": "a targeted literature and sequence-database search for consecutive integers with pairwise distinct values of the ordinary divisor function, checked through 2026-07-25",
    "bounds": {
      "status_year": {
        "min": 2026,
        "max": 2026
      }
    },
    "exhaustive": false
  },
  "reproduction": {
    "schema": "theoremdb-reproduction-v1",
    "readiness": "source_only",
    "kind": "claim",
    "citation": {
      "url": "https://arxiv.org/abs/1510.07081",
      "locator": "Vladimir A. Letsko, Some new results on consecutive equidivisible integers, 2015, especially the introduction and reported runs"
    },
    "missing": [
      "source",
      "command",
      "runtime",
      "expected_output"
    ]
  },
  "formal_statement": null,
  "source": {
    "url": "https://arxiv.org/abs/1510.07081",
    "locator": "Vladimir A. Letsko, Some new results on consecutive equidivisible integers, 2015, especially the introduction and reported runs"
  },
  "models": [],
  "relations": [
    {
      "slug": "R649",
      "title": "The requested maximum is at least fourteen",
      "object_type": "claim",
      "relation": "informs",
      "direction": "outgoing"
    },
    {
      "slug": "rainbow-divisor-count-run-1e12",
      "title": "rainbow divisor count run 1e12",
      "object_type": "problem",
      "relation": "recorded_for",
      "direction": "outgoing"
    }
  ]
}

7Provenance

View source, identifiers, and projection details

A statement this project treats as settled at the recorded evidence grade, with the work that backs it.

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