Pith Number

pith:4C6PGAI2

pith:2026:4C6PGAI2PZ5XPCIFNBUPYWD5F2

not attested not anchored not stored refs pending

Measuring Decidability as Related to Busy Beaver Numbers

Gurpreet Tandi, Jonathan Brown, Josue Gonzalez-Hendrix

arxiv:2605.20215 v1 · 2026-05-06 · cs.CC · cs.LO · math.LO · math.NT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4C6PGAI2PZ5XPCIFNBUPYWD5F2}

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	2026-05-21T00:04:21.405384Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e0bcf3011a7e7b7789056868fc587d2e9bf928f7604fb4d8e747050586203381

Aliases

arxiv: 2605.20215 · arxiv_version: 2605.20215v1 · doi: 10.48550/arxiv.2605.20215 · pith_short_12: 4C6PGAI2PZ5X · pith_short_16: 4C6PGAI2PZ5XPCIF · pith_short_8: 4C6PGAI2

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/4C6PGAI2PZ5XPCIFNBUPYWD5F2 \
  | 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: e0bcf3011a7e7b7789056868fc587d2e9bf928f7604fb4d8e747050586203381

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e0fdff76b2ae491913baeb93b82aa0f4c3b067a2258ccbf0cd937815358ea73d",
    "cross_cats_sorted": [
      "cs.LO",
      "math.LO",
      "math.NT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CC",
    "submitted_at": "2026-05-06T16:18:59Z",
    "title_canon_sha256": "e7c71fdc4fd2b40b75f43a8243258d4a06b1b7c98a9a031f8e5e79b989142753"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.20215",
    "kind": "arxiv",
    "version": 1
  }
}