Pith Number

pith:RS4FH7HI

pith:2025:RS4FH7HIM4YGZCHEZLM3YVTNW5

not attested not anchored not stored refs pending

Identifying Pre-training Data in LLMs: A Neuron Activation-Based Detection Framework

Hongyi Tang, Yi Yang, Zhihao Zhu

arxiv:2507.16414 v1 · 2025-07-22 · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{RS4FH7HIM4YGZCHEZLM3YVTNW5}

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.

Receipt and verification

First computed	2026-07-05T11:41:09.046140Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8cb853fce867306c88e4cad9bc566db774b3345ab829efb3cf8ec902c6fd14d5

Aliases

arxiv: 2507.16414 · arxiv_version: 2507.16414v1 · doi: 10.48550/arxiv.2507.16414 · pith_short_12: RS4FH7HIM4YG · pith_short_16: RS4FH7HIM4YGZCHE · pith_short_8: RS4FH7HI

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/RS4FH7HIM4YGZCHEZLM3YVTNW5 \
  | 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: 8cb853fce867306c88e4cad9bc566db774b3345ab829efb3cf8ec902c6fd14d5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9c0e49263722c12de258a279650128c6511dc20f59784f847e502282764a3324",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2025-07-22T10:05:30Z",
    "title_canon_sha256": "eb1c6ba440fdc9c2665e93b70f4458422395847f5c02e5c6eb53849fcebeaa3c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2507.16414",
    "kind": "arxiv",
    "version": 1
  }
}