Wikidata:Property proposal/prime factor

prime factor

Originally proposed at Wikidata:Property proposal/Natural science

   Done: prime factor (P5236) (Talk and documentation)

Description	one of the prime numbers that can be multiplied to give this number
Represents	prime factor (Q1137759)
Data type	Item
Domain	natural number (Q21199)
Example	2334 (Q19242165) → 2 (Q200), 389 (Q1194644), 3 (Q201)
Expected completeness	always incomplete (Q21873886)

Motivation

This was proposed by 99of9 here. It was also proposed that this property use the (mandatory?) qualifier quantity (P1114) to indicate the power of the prime as a factor. ArthurPSmith (talk) 19:02, 24 May 2018 (UTC)

Discussion

Opensofias
Tobias1984
Arthur Rubin
Cuvwb
TomT0m
Physikerwelt
Lymantria
Bigbossfarin
Infovarius
Helder
PhilMINT
Malore
Lore.mazza51
Wikisaurus
The Anome
The-erinaceous-one
Daniel Mietchen
Haansn08
Xenmorpha
John Samuel
Jeremy Dover
Toni 001
Bocardodarapti
Duckmather
HTinC23
fgnievinski

Notified participants of WikiProject Mathematics

 Comment There are numbers whose prime decomposition is only partly known, e.g., the 12th Fermat number. Consider having a more general property called factor; a qualifier can then be used to state that a factor is prime, probably prime or composite. -- IvanP (talk) 19:28, 24 May 2018 (UTC)

But then 12 would have 1, 2, 3, 4, 6, 12... which dilutes your ability to extract 2x2x3. Perhaps we could have a way of indicating whether our list was complete or incomplete, although I'm not sure how that works as a triple. --99of9 (talk) 00:44, 25 May 2018 (UTC)

@IvanP: For "probably" prime factors, you can use a qualifier nature of statement (P5102) with value presumably (Q18122778). I don't see any value in adding known composite factors. ArthurPSmith (talk) 13:20, 25 May 2018 (UTC)

As for adding composite factors, this would be useful if a number has two or more known composite factors of which no prime factors are known. I am not sure whether there is such a number that is notable to Wikidata, though. -- IvanP (talk) 22:08, 25 May 2018 (UTC)

•  Support. By the way, prime factor of prime number is self? --Okkn (talk) 07:19, 26 May 2018 (UTC)

• @Okkn: Yes, I would think so. ArthurPSmith (talk) 00:54, 28 May 2018 (UTC)

•  Support David (talk) 13:04, 26 May 2018 (UTC)
•  Support Helder 23:06, 27 May 2018 (UTC)
•  Support — Finn Årup Nielsen (fnielsen) (talk) 15:48, 28 May 2018 (UTC)

•  Done @ArthurPSmith, 99of9, Fnielsen, He7d3r, [[User::ديفيد عادل وهبة خليل 2|:ديفيد عادل وهبة خليل 2]], IvanP: please make good use of it.
  --- Jura 12:29, 1 June 2018 (UTC)