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Not evaluated

Erdős problem #1187: formalisation by Codex, GPT-5.5 (proof: “Trivial (second part)”)

The gist

According to the wiki of AI contributions to Erdős problems, a formalisation attributed to Codex and GPT-5.5 was reportedly announced on May 12, 2026 for a proof of problem #1187.

DiscoverIA status on October 12, 2026: not evaluated, meaning no third-party evaluation found.

Status detailsDetails

AI draft, not reviewedWhat has not been reviewed?

Text written by an AI (DiscoverIA pipeline), on . The status and its sources come from the registry; only the explanatory text has not been reviewed. A reported error is corrected, then the text is reviewed.

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Cite this entry

A single status snapshot since Oct 12, 2026: a citation always points to a dated snapshot.

Cite snapshot 1, Oct 12, 2026

APA citation with the dated link

DiscoverIA. (2026, October 12). Erdős problem #1187: formalisation by Codex, GPT-5.5 (proof: “Trivial (second part)”) [Status: Not evaluated, snapshot 1]. DiscoverIA registry. https://discoveria.ai/entry/erdos-1187-codex-gpt-5-5-2b#releve-1

BibTeX @misc, key discoveria-erdos-1187-codex-gpt-5-5-2b-r1

@misc{discoveria-erdos-1187-codex-gpt-5-5-2b-r1,
  author       = {{DiscoverIA}},
  title        = {Erdős problem #1187: formalisation by Codex, GPT-5.5 (proof: “Trivial (second part)”)},
  howpublished = {DiscoverIA registry, entry erdos-1187-codex-gpt-5-5-2b},
  note         = {Status “Not evaluated”, snapshot 1, recorded on October 12, 2026. Formalisation of a known result},
  year         = {2026},
  url          = {https://discoveria.ai/entry/erdos-1187-codex-gpt-5-5-2b#releve-1},
  urldate      = {2026-10-12}
}

Dated link opens this snapshot in the history

https://discoveria.ai/entry/erdos-1187-codex-gpt-5-5-2b#releve-1

To understand ≈ 30 s reading time, estimated

What it changes

If this formalisation held, the proof it targets could be checked by a program, step by step. The problem is classed under number theory, primes, additive combinatorics and arithmetic progressions; the contribution would only be the formalisation of an already known result.

What remains unclear

The wiki does not say what “second part” covers or which formal language is used. In the October 12, 2026 snapshot, erdosproblems.com lists the problem as “solved” but unformalised (current state, not that of June 2026); the sources read do not explain the gap with the announced formalisation. No third-party check is on record.

For experts

Sources, method, key facts, status history, report an error

Status

Not evaluated

Recorded on · github.com · wiki

Step 1 of 4 on the scale: not evaluated. Next step: under review.

  1. Announced
  2. Wiki frozen
  3. Recordednot evaluated
  4. nextTo follow
What this status means

Source reading : Source read word for word (level 3 of 3)

The result is declared neither right nor wrong.

To move to “Under review”: a public review under way. To “Peer reviewed”: a journal publication or a review by named experts.

Dated archive: status recorded on the wiki frozen on Jun 30, 2026

Full history

Sources

  • Main sourcegithub.com · wikipage read word for word · consulted on Oct 12, 2026
  • Reference listerdosproblems.comlink only, reading not recorded
  • Corroborationterrytao.wordpress.compage read word for word · consulted on Oct 17, 2026 · We have created a github repository to coordinate this process
  • Repositorygithub.com · CONTRIBUTING.mdpage read word for word · consulted on Oct 17, 2026 · this status is an unofficial crowdsourced classification of the problem

Method

Source: the “AI contributions to Erdős problems” wiki of the teorth/erdosproblems repository (a repository presented by Terence Tao in his blog post of August 31, 2025); frozen on June 30, 2026 (commit c8ad430, “freeze”) and read on October 12, 2026 in the git repository. Category 2(b), “Formalization” (secondary contribution). Humans named by the wiki: none; AI systems: Codex, GPT-5.5. Date given by the wiki: May 12, 2026. Exact text: “Formalization”. Proof to formalise: Trivial (second part); wiki flag on this proof: green (“full resolution”, according to the wiki's legend); the wiki does not name the formal language on this line. Literature cited by the wiki: none. Status of the problem in the teorth/erdosproblems community database (data/problems.yaml, unofficial classification, snapshot of October 12, 2026 with no commit identified, current state, not that of June 2026): resolved other than by a yes-or-no answer (informal_status=solved); no formalised solution known (formal_status=unformalized). This status concerns the problem, not this contribution. Problem page not read by DiscoverIA: https://www.erdosproblems.com/1187. DiscoverIA status: not evaluated (only the wiki's classification exists). Recorded on October 12, 2026.

Limits

Nature: formalisation (an already known result translated into a language a machine can check), not a discovery. DiscoverIA has not checked this contribution itself.

Key facts

Claimed by
Codex, GPT-5.5, according to the AI-Erdős wiki
announced on May 12, 2026
Nature
formalisation of a known result
Field
Mathematics (Erdős problem #1187 (number theory ; primes ; additive combinatorics ; arithmetic progressions))
Wiki category
Formalization (contribution secondaire : formalisation)
Proof formalised
Trivial's
Checked by
no verifier identified
Sources
4 : 3 read word for word, 1 link only
This entry
AI draft, not reviewed

Status history

Only one observation so far.

  1. 01

    First observation:Not evaluatedCurrent status

    Source: github.comread word for word

An observation is added; none is ever erased.

In the same set

AI contributions to Erdős problems (wiki by T. Tao, frozen on June 30, 2026) · entry 503 of 521, by problem number

See all 521 entries

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