Pith Number

pith:ZCBFK43L

pith:2026:ZCBFK43LBEMOTG7XU45KASGHEK

not attested not anchored not stored refs pending

Micron-Scale Technosignatures: How a Cubic Metre of Lunar Regolith May Begin to Constrain the Number of Past Technological Civilisations in the Galaxy

Andrew P. V. Siemion, Brian C. Lacki, Ian A. Crawford, Lewis J. Pinault

arxiv:2606.24028 v1 · 2026-06-23 · astro-ph.EP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZCBFK43LBEMOTG7XU45KASGHEK}

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	2026-06-24T01:14:38.513467Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c88255736b0918e99bf7a73aa048c722a151bc06ad629e96e2d689d07f14a334

Aliases

arxiv: 2606.24028 · arxiv_version: 2606.24028v1 · doi: 10.48550/arxiv.2606.24028 · pith_short_12: ZCBFK43LBEMO · pith_short_16: ZCBFK43LBEMOTG7X · pith_short_8: ZCBFK43L

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/ZCBFK43LBEMOTG7XU45KASGHEK \
  | 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: c88255736b0918e99bf7a73aa048c722a151bc06ad629e96e2d689d07f14a334

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "72d60e27650e30d0e732e55c12efd035289fcfd7b84c1fe4a8c137611074d4bf",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2026-06-23T00:07:50Z",
    "title_canon_sha256": "e17ab05e0211a608a964c7facbefd619398078f553211f4fb1d97947de0051b4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2606.24028",
    "kind": "arxiv",
    "version": 1
  }
}