Pith Number

pith:6PERXP42

pith:2019:6PERXP42MKTX2W65WFHV577L5S

not attested not anchored not stored refs pending

Hacking Google reCAPTCHA v3 using Reinforcement Learning

Amal Feriani, Ismail Akrout, Mohamed Akrout

arxiv:1903.01003 v3 · 2019-03-03 · cs.LG · 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{6PERXP42MKTX2W65WFHV577L5S}

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

1 paper in Pith

COGNITION: From Evaluation to Defense against Multimodal LLM CAPTCHA Solvers

Receipt and verification

First computed	2026-05-17T23:48:14.568755Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f3c91bbf9a62a77d5bddb14f5effebecb37684e37bb0beac6594d0c3c38d9474

Aliases

arxiv: 1903.01003 · arxiv_version: 1903.01003v3 · doi: 10.48550/arxiv.1903.01003 · pith_short_12: 6PERXP42MKTX · pith_short_16: 6PERXP42MKTX2W65 · pith_short_8: 6PERXP42

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/6PERXP42MKTX2W65WFHV577L5S \
  | 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: f3c91bbf9a62a77d5bddb14f5effebecb37684e37bb0beac6594d0c3c38d9474

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f195162a3f643df90be144b3af0f5850f1810ef4d8d91163e3c7787c55a77d68",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2019-03-03T22:10:47Z",
    "title_canon_sha256": "9a8750f22710508b104bd66671e8c7f3924125bb603fd2dc8cf9a5e379e29368"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.01003",
    "kind": "arxiv",
    "version": 3
  }
}