Pith Number

pith:QY4DM7U4

pith:2019:QY4DM7U4W4KTCNF7HBKPE3KMEH

not attested not anchored not stored refs pending

Repeatedly Appending Any Digit to Generate Composite Numbers

John Rickert, Jon Grantham, Stan Wagon, Witold Jarnicki

arxiv:1903.05023 v1 · 2019-03-12 · 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{QY4DM7U4W4KTCNF7HBKPE3KMEH}

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	2026-05-17T23:51:26.505187Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8638367e9cb7153134bf3854f26d4c21c1864045c4498a9365bdb8baad2f5ca2

Aliases

arxiv: 1903.05023 · arxiv_version: 1903.05023v1 · doi: 10.48550/arxiv.1903.05023 · pith_short_12: QY4DM7U4W4KT · pith_short_16: QY4DM7U4W4KTCNF7 · pith_short_8: QY4DM7U4

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/QY4DM7U4W4KTCNF7HBKPE3KMEH \
  | 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: 8638367e9cb7153134bf3854f26d4c21c1864045c4498a9365bdb8baad2f5ca2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6f0e0490e11c138802eeea9e11f2405d622c74f41e3414bb810a46771806dbe5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NT",
    "submitted_at": "2019-03-12T16:26:42Z",
    "title_canon_sha256": "0c76573e0a18e4773e4cefab24ae3d647794e2323daa2b1d6add1e800a273165"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.05023",
    "kind": "arxiv",
    "version": 1
  }
}