Pith Number

pith:SBRJQPRU

pith:2025:SBRJQPRU3QJKOSHEPYXR7Q7VX5

not attested not anchored not stored refs pending

The Ishango Bone: Evidence for Intentional Arithmetic Design in the Upper Palaeolithic?

Jenny Baur

arxiv:2504.06412 v4 · 2025-04-08 · math.HO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SBRJQPRU3QJKOSHEPYXR7Q7VX5}

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	2026-05-20T00:02:49.385093Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9062983e34dc12a748e47e2f1fc3f5bf40a96d4441be74fbc6d444869675bed3

Aliases

arxiv: 2504.06412 · arxiv_version: 2504.06412v4 · doi: 10.48550/arxiv.2504.06412 · pith_short_12: SBRJQPRU3QJK · pith_short_16: SBRJQPRU3QJKOSHE · pith_short_8: SBRJQPRU

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/SBRJQPRU3QJKOSHEPYXR7Q7VX5 \
  | 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: 9062983e34dc12a748e47e2f1fc3f5bf40a96d4441be74fbc6d444869675bed3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9927ac4e0a309bd86c3acf14131d6f3eaeef4c67d2eb171399c653e19ac14c83",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.HO",
    "submitted_at": "2025-04-08T20:11:44Z",
    "title_canon_sha256": "64de7baf92edbbf3c5554b11d88cc0f04e20d65adaa3dcb1cf34ab70be7e92de"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2504.06412",
    "kind": "arxiv",
    "version": 4
  }
}