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Heegner number

square-free positive integer such that the corresponding imaginary quadratic field has unique factorization; one of 1, 2, 3, 7, 11, 19, 43, 67, or 163
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Heegner number

Summary

Heegner number ranks in the top 2% of general entities by monthly Wikipedia readership (288 views/month).[1]

Key Facts

  • Kurt Heegner is named after Heegner number[2].
  • Heegner number's subclass of is recorded as square-free integer[3].
  • Heegner number's Freebase ID is recorded as /m/02l558[4].
  • Heegner number's OEIS ID is recorded as A003173[5].
  • Heegner number's defining formula is recorded as 1, 2, 3, 7, 11, 19, 43, 67, 163[6].
  • Heegner number's MathWorld ID is recorded as HeegnerNumber[7].
  • Heegner number's maintained by WikiProject is recorded as WikiProject Mathematics[8].
  • Heegner number's Microsoft Academic ID is recorded as 179904766[9].

Why It Matters

Heegner number ranks in the top 2% of general entities by monthly Wikipedia readership (288 views/month).[1] It has Wikipedia articles in 14 language editions, a strong signal of global cultural recognition.[10] It is known by 5 alternative names across languages and contexts.[11]

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] ↑ . Freebase Data Dumps. wikidata.org.
  4. [5] ↑ . wikidata.org.
  5. [6] ↑ . wikidata.org.
  6. [7] ↑ . wikidata.org.
  7. [8] ↑ . wikidata.org.
  8. [9] ↑ . wikidata.org.

Aggregate / graph-position facts

  1. [1] ↑ . Wikimedia Foundation. dumps.wikimedia.org.
  2. [10] ↑ . Wikidata sitelinks. wikidata.org.
  3. [11] ↑ . 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). Heegner number. Retrieved April 10, 2026, from https://4ort.xyz/entity/heegner-number
MLA “Heegner number.” 4ort.xyz Knowledge Graph, 4ort.xyz, 10 Apr. 2026, https://4ort.xyz/entity/heegner-number.
BibTeX @misc{4ortxyz_heegner-number_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Heegner number}}, year = {2026}, url = {https://4ort.xyz/entity/heegner-number}, note = {Accessed: 2026-04-10}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Heegner number — https://4ort.xyz/entity/heegner-number (retrieved 2026-04-10)

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