# Talk:prime number

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~~prime number~~Edit

There are numerous texts that say things like "the number 3 is prime" without using the adjective *prime* as a part of this phrase. This phrase means nothing more than the sum of its parts.—msh210 20:21, 27 August 2007 (UTC)

- According to Mathworld -
*A*That's good enough for me.**prime number**(or prime integer, often simply called a "prime" for short) is a . . . .**Keep**SemperBlotto 21:27, 27 August 2007 (UTC)

- What's good enough for you? The fact that it's called
*prime*or short? or that fact that MathWorld boldfaces the whole phrase? or the fact that the title of MathWorld's entry is "Prime Number"? Or what? (Just trying to understand.)—msh210 21:57, 27 August 2007 (UTC)

- What's good enough for you? The fact that it's called

- You should be aware that MathWorld has entries that are not findable on Google Scholar or Books or Web search. An example is radical root (google:radical-root, scholar:radical-root).—msh210 21:57, 27 August 2007 (UTC)

- In the past we've gone both ways on this; we kept extinct volcano and deleted oblique leaf. I'm not sure if we have any sort of rule for these decisions. —Ruakh
_{TALK}21:42, 27 August 2007 (UTC) - A math text could say the number 6.3 is prime - but it would be wrong, and you'd need to know the definition to know why.
**Strong keep**.*bd2412***T**22:02, 27 August 2007 (UTC)

- Sorry, but that example doesn't really seem to apply; if your math book said that, then you wouldn't see the phrase "prime number" so wouldn't know to look at prime number. —Ruakh
_{TALK}00:34, 28 August 2007 (UTC)

- Sorry, but that example doesn't really seem to apply; if your math book said that, then you wouldn't see the phrase "prime number" so wouldn't know to look at prime number. —Ruakh

**Keep**. Part of the reasoning I use to consider a case like this is whether the combination is likely to be listed as such in a specialist dictionary for that field or would be listed in that form in the index of a textbook on the subject. You could resonably expect to find prime number as a term in a math dictionary or the index of a math text. You would*not*find oblique leaf as an entry in a botanical glossary or in the index of a botany book. --EncycloPetey 00:33, 28 August 2007 (UTC)- I agree that
*prime number*is a term in the respective indices of some math textbooks. So are personal names; so are sums of parts like free group and prime ideal and permutation group. The latter needs a definition in math dictionary maybe (as*permutation group*is much more common a term in algebra than*permutation*alone is, so*permutation*is unlikely to have a defnition) but not in a general dictionary; nor should the others have definitions in math*or*regular dictionaries.—msh210 17:15, 28 August 2007 (UTC)

- I agree that
**Keep**. “Prime number” is orders of magnitude more common than “prime integer”, so “prime number” seems to be a set phrase. Rod (A. Smith) 17:23, 28 August 2007 (UTC)**Keep**. The meaning of prime is not obvious in the term prime number, especially when there are two maths definitions.--Dmol 20:25, 28 August 2007 (UTC)

**Keep**set phrase. --Connel MacKenzie 15:32, 29 August 2007 (UTC)

- I can see this entry becoming a version of the
*fried egg test*for set phrases. I would agree keep for this as a set phrase because there is no other phrase which you would commonly find which means this particular set of integer numbers. What is the state of the discussion on**set phrases**at the moment, btw? -- Algrif 15:36, 30 August 2007 (UTC)

- I can see this entry becoming a version of the

- See Wiktionary:List of idioms that survived RFD.
*Fried egg*does not apply, but*Egyptian pyramid*might, and also*prior knowledge*. Still, I think we should make exceptions for even oblique leaf per above. DAVilla 19:09, 2 September 2007 (UTC)

- See Wiktionary:List of idioms that survived RFD.

**Keep**. The word*prime*has**n**definitions and*number*has**m**of them. Theoretically*prime number*can refer to any of the**n x m**combinations. As we know, it refers to only one. Most of the combinations do not make sense, but especially from the point of view of non-native users and those unfamiliar with math terminology, it is useful to know which one is correct. Besides, the term*prime number*has established translations into other languages, which cannot necessarily be derived from its parts. Hekaheka 16:12, 2 September 2007 (UTC)

**Kept.** DAVilla 19:09, 2 September 2007 (UTC)

## Non mathematical meaning?Edit

Doesn't it have a secondary meaning for 'an important number' of a particular thing? 89.243.163.176 22:13, 21 September 2010 (UTC)