Ramanujan–Nagell equation

the Diophantine equation 2ⁿ−7=𝑥²
Intangible theorem Q1914905
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Ramanujan–Nagell equation

Summary

Ramanujan–Nagell equation is a theorem[1]. It draws 33 Wikipedia views per month (theorem category, ranking #244 of 1,306).[2]

Key Facts

  • Ramanujan–Nagell equation's instance of is recorded as theorem[3].
  • Ramanujan–Nagell equation's instance of is recorded as Diophantine equation[4].
  • Trygve Nagell is named after Ramanujan–Nagell equation[5].
  • Srinivasa Ramanujan is named after Ramanujan–Nagell equation[6].
  • Ramanujan–Nagell equation's part of is recorded as list of theorems[7].
  • Ramanujan–Nagell equation's Freebase ID is recorded as /m/07b9vk[8].
  • Ramanujan–Nagell equation's defining formula is recorded as 2^n-7=x^2[9].
  • Ramanujan–Nagell equation's MathWorld ID is recorded as RamanujansSquareEquation[10].
  • Ramanujan–Nagell equation's maintained by WikiProject is recorded as WikiProject Mathematics[11].
  • Ramanujan–Nagell equation's Microsoft Academic ID is recorded as 189804812[12].
  • Ramanujan–Nagell equation's ProofWiki ID is recorded as Definition:Ramanujan-Nagell_Equation[13].

Why It Matters

Ramanujan–Nagell equation draws 33 Wikipedia views per month (theorem category, ranking #244 of 1,306).[2] It has Wikipedia articles in 12 language editions, a strong signal of global cultural recognition.[14]

References

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

Direct Wikidata claims

  1. [3] . wikidata.org.
  2. [4] . wikidata.org.
  3. [5] . wikidata.org.
  4. [6] . wikidata.org.
  5. [7] . wikidata.org.
  6. [8] . Freebase Data Dumps. wikidata.org.
  7. [9] . wikidata.org.
  8. [10] . wikidata.org.
  9. [11] . wikidata.org.
  10. [12] . wikidata.org.
  11. [13] . wikidata.org.

Class ancestry

  1. [1] . Wikidata. wikidata.org.

Aggregate / graph-position facts

  1. [2] . Wikimedia Foundation. dumps.wikimedia.org.
  2. [14] . Wikidata sitelinks. 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). Ramanujan–Nagell equation. Retrieved May 3, 2026, from https://4ort.xyz/entity/ramanujan-nagell-equation
MLA “Ramanujan–Nagell equation.” 4ort.xyz Knowledge Graph, 4ort.xyz, 3 May. 2026, https://4ort.xyz/entity/ramanujan-nagell-equation.
BibTeX @misc{4ortxyz_ramanujan-nagell-equation_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Ramanujan–Nagell equation}}, year = {2026}, url = {https://4ort.xyz/entity/ramanujan-nagell-equation}, note = {Accessed: 2026-05-03}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Ramanujan–Nagell equation — https://4ort.xyz/entity/ramanujan-nagell-equation (retrieved 2026-05-03)

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