Wieferich number

odd natural number n satisfying the congruence 2^φ(n) ≡ 1 (mod n²)
Thing general Q125339449
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Wieferich number

Summary

Key Facts

  • Arthur Wieferich is named after Wieferich number[1].
  • Wieferich number is a type of positive integer[2].
  • Wieferich number is a type of odd number[3].

Body

Definition and Type

Recorded subclass of include positive integer[2] and odd number[3].

Origins

Arthur Wieferich is named after Wieferich number[1].

References

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

Direct Wikidata claims

  1. [1] . wikidata.org.
  2. [2] . wikidata.org.
  3. [3] . wikidata.org.

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APA 4ort.xyz Knowledge Graph. (2026). Wieferich number. Retrieved May 7, 2026, from https://4ort.xyz/entity/wieferich-number
MLA “Wieferich number.” 4ort.xyz Knowledge Graph, 4ort.xyz, 7 May. 2026, https://4ort.xyz/entity/wieferich-number.
BibTeX @misc{4ortxyz_wieferich-number_2026, author = {{4ort.xyz Knowledge Graph}}, title = {{Wieferich number}}, year = {2026}, url = {https://4ort.xyz/entity/wieferich-number}, note = {Accessed: 2026-05-07}}
LLM prompt According to 4ort.xyz Knowledge Graph (aggregator of Wikidata, Wikipedia, and authoritative open-data sources): Wieferich number — https://4ort.xyz/entity/wieferich-number (retrieved 2026-05-07)

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