Pith Number

pith:L3W5N3YP

pith:2017:L3W5N3YP46WQ6G2PJJI7YBSGJA

not attested not anchored not stored refs pending

Subsurface Exolife

Abraham Loeb, Manasvi Lingam

arxiv:1711.09908 v3 · 2017-11-27 · astro-ph.EP · astro-ph.SR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{L3W5N3YP46WQ6G2PJJI7YBSGJA}

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.

Cited by

1 paper in Pith

Upper limit on the fraction of alien civilizations that develop communication technology

Receipt and verification

First computed	2026-05-17T23:49:06.082738Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5eedd6ef0fe7ad0f1b4f4a51fc0646482c8922854fcf970e5fa31561dd40d668

Aliases

arxiv: 1711.09908 · arxiv_version: 1711.09908v3 · doi: 10.48550/arxiv.1711.09908 · pith_short_12: L3W5N3YP46WQ · pith_short_16: L3W5N3YP46WQ6G2P · pith_short_8: L3W5N3YP

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/L3W5N3YP46WQ6G2PJJI7YBSGJA \
  | 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: 5eedd6ef0fe7ad0f1b4f4a51fc0646482c8922854fcf970e5fa31561dd40d668

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f5947f4408a6b24e7e71ed68f8ef612c644ced165c8da32f8c3fbaf73dc74aea",
    "cross_cats_sorted": [
      "astro-ph.SR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.EP",
    "submitted_at": "2017-11-27T19:00:02Z",
    "title_canon_sha256": "ba2e9f70df6fed25721f33f0573260abed093980d10a454f9424bc4e967341c5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1711.09908",
    "kind": "arxiv",
    "version": 3
  }
}