Pith Number

pith:XAKGZFJP

pith:2017:XAKGZFJPBOBXCP3GPDYQ4RTAJA

not attested not anchored not stored refs pending

Busy Beaver Scores and Alphabet Size

Holger Petersen

arxiv:1704.08752 v1 · 2017-04-27 · cs.FL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XAKGZFJPBOBXCP3GPDYQ4RTAJA}

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	2026-05-18T00:45:25.367511Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b8146c952f0b83713f6678f10e466048115422aa32b46a3b8512b4188db98d88

Aliases

arxiv: 1704.08752 · arxiv_version: 1704.08752v1 · doi: 10.48550/arxiv.1704.08752 · pith_short_12: XAKGZFJPBOBX · pith_short_16: XAKGZFJPBOBXCP3G · pith_short_8: XAKGZFJP

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/XAKGZFJPBOBXCP3GPDYQ4RTAJA \
  | 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: b8146c952f0b83713f6678f10e466048115422aa32b46a3b8512b4188db98d88

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f8fe6ee1725df01de6cc1aaf67ee28a6783b75b6e90ab3bff8e56e928a1937cb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.FL",
    "submitted_at": "2017-04-27T21:29:44Z",
    "title_canon_sha256": "96d16c306dab627397c98a7f4f1de02c0a5e7b0a939f58b629c05a681305e5a6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1704.08752",
    "kind": "arxiv",
    "version": 1
  }
}