Pith Number

pith:4U72QVPQ

pith:2025:4U72QVPQ3LXRNVFHFKQA4HXKKZ

not attested not anchored not stored refs pending

Ultra-FineWeb: Efficient Data Filtering and Verification for High-Quality LLM Training Data

Chaojun Xiao, Guoyang Zeng, Hongya Lyu, Jie Cai, Jie Zhou, Peijun Tang, Xu Han, Yewei Fang, Yudong Wang, Zhiyuan Liu, Zhi Zheng, Zixuan Fu

arxiv:2505.05427 v1 · 2025-05-08 · cs.CL

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4U72QVPQ3LXRNVFHFKQA4HXKKZ}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Cited by

2 papers in Pith

The Ratchet Effect in Silico: How Interaction Drives Cumulative Intelligence in Large Language Models

Scaling Latent Reasoning via Looped Language Models

Receipt and verification

First computed	2026-07-05T11:00:24.315881Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e53fa855f0daef16d4a72aa00e1eea566debc71ff3c6ed1cdec52d9a337355a4

Aliases

arxiv: 2505.05427 · arxiv_version: 2505.05427v1 · doi: 10.48550/arxiv.2505.05427 · pith_short_12: 4U72QVPQ3LXR · pith_short_16: 4U72QVPQ3LXRNVFH · pith_short_8: 4U72QVPQ

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/4U72QVPQ3LXRNVFHFKQA4HXKKZ \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: e53fa855f0daef16d4a72aa00e1eea566debc71ff3c6ed1cdec52d9a337355a4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8ab34fdf85020432ac99c2c9bd85c6a4f403601538626506339be0a64aad4343",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2025-05-08T17:15:20Z",
    "title_canon_sha256": "315fdfcbd506e9c5a7619a484c4acdaed297cf678ad09b9f52494a8e45420325"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.05427",
    "kind": "arxiv",
    "version": 1
  }
}