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Riesel number

odd natural number k such that k·2^n − 1 is composite for all natural n
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Riesel number

Summary

Riesel number ranks in the top 2% of general entities by monthly Wikipedia readership (29 views/month).[1]

Key Facts

  • Hans Riesel is named after Riesel number[2].
  • Riesel number is a type of positive integer[3].
  • Riesel number is a type of odd number[4].
  • Riesel number's studied by is recorded as number theory[5].
  • Riesel number's maintained by WikiProject is recorded as WikiProject Mathematics[6].

Body

Definition and Type

Recorded subclass of include positive integer[3] and odd number[4].

Origins

Hans Riesel is named after Riesel number[2].

Why It Matters

Riesel number ranks in the top 2% of general entities by monthly Wikipedia readership (29 views/month).[1] It has Wikipedia articles in 12 language editions, a strong signal of global cultural recognition.[7] It is known by 3 alternative names across languages and contexts.[8]

References

Programmatic citations — every numbered marker resolves to a verifiable graph row below.

Direct Wikidata claims

  1. [2] ↑ . wikidata.org.
  2. [3] ↑ . wikidata.org.
  3. [4] ↑ . wikidata.org.
  4. [5] ↑ . wikidata.org.
  5. [6] ↑ . wikidata.org.

Aggregate / graph-position facts

  1. [1] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [7] ↑ . Wikidata sitelinks. wikidata.org.
  3. [8] ↑ . Wikidata aliases. wikidata.org.

📑 Cite this page

Use these citations when quoting this entity in research, articles, AI prompts, or wherever provenance matters. We aggregate Wikidata + Wikipedia + authoritative open-data sources; the stitched, scored, cross-referenced view is what 4ort.xyz contributes.

APA 4ort.xyz Knowledge Graph. (2026). Riesel number. Retrieved April 10, 2026, from https://4ort.xyz/entity/riesel-number
MLA “Riesel number.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Apr. 2026, https://4ort.xyz/entity/riesel-number.
BibTeX @misc{4ortxyz_riesel-number_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Riesel number}}, year = {2026}, url = {https://4ort.xyz/entity/riesel-number}, note = {Accessed: 2026-04-10}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Riesel number — https://4ort.xyz/entity/riesel-number (retrieved 2026-04-10)

Canonical URL: https://4ort.xyz/entity/riesel-number · Last refreshed:

Edit History

Rolling log of changes to this entity's Wikidata record. Values shown reflect the current state of each edited property — follow the history link to see the precise diff for any edit.

  1. 15d ago · KrBot bot · 2026-05-06 view diff on Wikidata ↗
    Studied by → number theory
    Aliases → —
    Maintained by wikiproject → WikiProject Mathematics
    Named after → Hans Riesel
    + 3 other properties edited (see Wikidata diff for full list)
    "/* wbsetclaimvalue:1| */ [[Property:P279]]: [[Q16317911]], разрешение перенаправления / resolving redirect [[Q28920044]] → [[Q16317911]] ([[:toollabs:editgroups/b/KrBotResolvingRedirect/Q28920044_Q163"
Live feed via Wikidata EventStreams. New edits appear within minutes of being made on Wikidata.