Pith Number

pith:QVSEC2HK

pith:2013:QVSEC2HKR5OJZ6TLSRJNW4OK7J

not attested not anchored not stored refs pending

The Generalised Fermat Equation x^2 + y^3 = z^15

Michael Stoll, Samir Siksek

arxiv:1309.4421 v2 · 2013-09-17 · 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{QVSEC2HKR5OJZ6TLSRJNW4OK7J}

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	2026-05-18T01:10:11.171061Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85644168ea8f5c9cfa6b9452db71cafa5d671ed8133351d58239bf9c28bd0180

Aliases

arxiv: 1309.4421 · arxiv_version: 1309.4421v2 · doi: 10.48550/arxiv.1309.4421 · pith_short_12: QVSEC2HKR5OJ · pith_short_16: QVSEC2HKR5OJZ6TL · pith_short_8: QVSEC2HK

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/QVSEC2HKR5OJZ6TLSRJNW4OK7J \
  | 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: 85644168ea8f5c9cfa6b9452db71cafa5d671ed8133351d58239bf9c28bd0180

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "78ce075986ff9ecc1f6f96c4593f2cf14af1531ee41f9f27c6113e66f8aac185",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NT",
    "submitted_at": "2013-09-17T18:41:51Z",
    "title_canon_sha256": "f155323de6122c12e47969c952cdd9adad04207da9f281d74de2eb44badfe5ac"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.4421",
    "kind": "arxiv",
    "version": 2
  }
}