Pith Number

pith:IKEGCVU2

pith:2018:IKEGCVU2CO4ILWRO7KPJ2G5USS

not attested not anchored not stored refs pending

Relative Likelihood of Success in the Searches for Primitive versus Intelligent Extraterrestrial Life

Abraham Loeb, Manasvi Lingam

arxiv:1807.08879 v3 · 2018-07-24 · physics.pop-ph · 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{IKEGCVU2CO4ILWRO7KPJ2G5USS}

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	2026-05-17T23:57:02.777835Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

428861569a13b885da2efa9e9d1bb494ac93aa4d561151ac66564dc8441c8192

Aliases

arxiv: 1807.08879 · arxiv_version: 1807.08879v3 · doi: 10.48550/arxiv.1807.08879 · pith_short_12: IKEGCVU2CO4I · pith_short_16: IKEGCVU2CO4ILWRO · pith_short_8: IKEGCVU2

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/IKEGCVU2CO4ILWRO7KPJ2G5USS \
  | 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: 428861569a13b885da2efa9e9d1bb494ac93aa4d561151ac66564dc8441c8192

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ab66568efb6227a48f338a7bc1495d5642dea0d8530a67b62530714c463e0b93",
    "cross_cats_sorted": [
      "astro-ph.EP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.pop-ph",
    "submitted_at": "2018-07-24T01:57:12Z",
    "title_canon_sha256": "56fa81c6a7fb547a7c113351da0c572b37b8d7557c625db2441b31063f30906f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.08879",
    "kind": "arxiv",
    "version": 3
  }
}