Pith Number

pith:KUJPNBYL

pith:2017:KUJPNBYLEMVQG64JBA6NZ2GTID

not attested not anchored not stored refs pending

Busy beavers and Kolmogorov complexity

Mikhail Andreev

arxiv:1703.05170 v1 · 2017-03-15 · cs.CC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KUJPNBYLEMVQG64JBA6NZ2GTID}

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	2026-05-18T00:48:38.166221Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5512f6870b232b037b89083cdce8d340db4bcf03f4a27e880f5be13dc1e423cf

Aliases

arxiv: 1703.05170 · arxiv_version: 1703.05170v1 · doi: 10.48550/arxiv.1703.05170 · pith_short_12: KUJPNBYLEMVQ · pith_short_16: KUJPNBYLEMVQG64J · pith_short_8: KUJPNBYL

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/KUJPNBYLEMVQG64JBA6NZ2GTID \
  | 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: 5512f6870b232b037b89083cdce8d340db4bcf03f4a27e880f5be13dc1e423cf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "46a065df18fa44c0b5c4c2673e1cab38b6fa13aac47f5384e14fe8f719662003",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2017-03-15T14:21:40Z",
    "title_canon_sha256": "c49a6606fb3879588363a6e5ff4e0ef063fcf2fa647bad4fb545d4a48b74d33a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1703.05170",
    "kind": "arxiv",
    "version": 1
  }
}