Talk:2
2 has been listed as a level5 vital article in Mathematics. If you can improve it, please do. This article has been rated as CClass by WikiProject Vital Articles. 
This is the talk page for discussing improvements to the 2 article. This is not a forum for general discussion of the article's subject. 
Article policies

Find sources: Google (books · news · scholar · free images · WP refs) · FENS · JSTOR · NYT · TWL 
Archives: 1 
This article is of interest to the following WikiProjects:  

Daily pageviews of this article 
Fancy picture[edit]
At 3 (telecommunications), there is a fancy picture of a 3. At Channel 4, there is a fancy picture of a 4. Do any Wikipedia articles mention a fancy picture of a 2?? Georgia guy 23:05, 18 Jan 2005 (UTC)
Numerical prefixes for 2[edit]
Like the other numbers, 2 has a Greek numerical prefix and a Latin numerical prefix. Unlike the other numbers, however, there is also a prefix for 2, twi, that is neither Greek nor Latin. What language is it?? Georgia guy 23:18, 20 Jan 2005 (UTC)
 I'm not really sure it's a prefix  I would guess that "twice" and "twin" are just derived from "two", which itself comes from "duo". It's not like sticking "twi" on the front of any other word would make sense. sjorford 15:01, 21 Jan 2005 (UTC)
 My dictionary (Webster's NewWorld, college edition) says "twi" is a prefix from Middle English via Old English. There are plenty of other twi words; see my additions to twi. dbenbenn  talk 16:04, 21 Jan 2005 (UTC)
The only even prime number[edit]
I think the statement about "2 being the only prime number that is even" should be removed. It is true, but only in a trivial and non "wikipedy" sense.
We could also say that 3 is the only prime number divisible by 3, or that 5 is the only prime number divisible by 5.
Every prime number p is the only prime number divisible by p  and this fact is not (of course) stated in any of their pages.
"14 is the largest natural number below 15", "100 is the smallest 3digit natural number", etc., are also true but have no "wikipedy" value, and therefore are not written.
(I suspect that because we have a special word, "even", instead of "divisible by 2"  is what gave birth to "2 is the only even prime" and what makes it sound nontrivial for a second. Roypit (talk) 10:40, 4 July 2022 (UTC)
 It's been identified as a notable property of 2 for a long time, more or less in the vein that 0 is even. These are not necessarily trivial, but rather more in line with exceptional. This is because the even "nature" of 2 blends with its prime properties; as such, it is useful both when dealing with special prime numbers such as Mersenne primes and Fermat primes, while being distinctively relevant inside abundant numbers and deficient numbers, for example. I hope this helps. B, Radlrb (talk) 20:46, 4 October 2022 (UTC)
"꤂" listed at Redirects for discussion[edit]
An editor has identified a potential problem with the redirect ꤂ and has thus listed it for discussion. This discussion will occur at Wikipedia:Redirects for discussion/Log/2022 July 4#꤂ until a consensus is reached, and readers of this page are welcome to contribute to the discussion. 1234qwer1234qwer4 22:58, 4 July 2022 (UTC)
Link Donald_Thomson article[edit]
https://en.m.wikipedia.org/wiki/Donald_Thomson FynderEnlil (talk) 14:28, 1 February 2023 (UTC)