Pith Number

pith:I4MBPNW5

pith:2008:I4MBPNW5IRAIUEHS4OFI5AYX5F

not attested not anchored not stored refs pending

On Hunting for Taxicab Numbers

Pavel Emelyanov

arxiv:0802.1147 v1 · 2008-02-08 · 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{I4MBPNW5IRAIUEHS4OFI5AYX5F}

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	2026-07-04T15:09:25.058038Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

471817b6dd44408a10f2e38a8e8317e95804c7363beef1b6c8bb66bfe2080f81

Aliases

arxiv: 0802.1147 · arxiv_version: 0802.1147v1 · doi: 10.48550/arxiv.0802.1147 · pith_short_12: I4MBPNW5IRAI · pith_short_16: I4MBPNW5IRAIUEHS · pith_short_8: I4MBPNW5

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/I4MBPNW5IRAIUEHS4OFI5AYX5F \
  | 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: 471817b6dd44408a10f2e38a8e8317e95804c7363beef1b6c8bb66bfe2080f81

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "79e597da92c71b8c9ff5eb6fed0d4512ec845bca86848b5cfe978e31888efa73",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NT",
    "submitted_at": "2008-02-08T13:17:01Z",
    "title_canon_sha256": "d1e4274fa10892d855f0b280795be65ecb257978a7189cd056bdbcd1124e2a76"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0802.1147",
    "kind": "arxiv",
    "version": 1
  }
}