Pith Number

pith:P45SZCLK

pith:2020:P45SZCLKY3AZJU2HKQGOQSAJCO

not attested not anchored not stored refs pending

The Program with a Personality: Analysis of Elk Cloner, the First Personal Computer Virus

Jedidiah R. Crandall, Scott Levy

arxiv:2007.15759 v1 · 2020-07-30 · cs.CR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{P45SZCLKY3AZJU2HKQGOQSAJCO}

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	2026-07-05T01:23:37.910520Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7f3b2c896ac6c194d347540ce8480913b6915bd1b76edbd02b835bbcf1d92105

Aliases

arxiv: 2007.15759 · arxiv_version: 2007.15759v1 · doi: 10.48550/arxiv.2007.15759 · pith_short_12: P45SZCLKY3AZ · pith_short_16: P45SZCLKY3AZJU2H · pith_short_8: P45SZCLK

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/P45SZCLKY3AZJU2HKQGOQSAJCO \
  | 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: 7f3b2c896ac6c194d347540ce8480913b6915bd1b76edbd02b835bbcf1d92105

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cf3f8050d667a47b6d653538b5b4b84570dfba3e41880d4e5a4c5934fd131877",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CR",
    "submitted_at": "2020-07-30T22:16:45Z",
    "title_canon_sha256": "bc9369bc4fcf5069e2505ba65745f2336f7d0a5903dcfc4dca15edc960972ed7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2007.15759",
    "kind": "arxiv",
    "version": 1
  }
}