Sexy===263 -- Newtron23/11/20106/12/2010Canberra Zimbabwe368

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Date Posted: Monday, November 29, 09:18:41pm
Author: 200 day moving average 24/11/2010==257
Subject:

Sexy===263
In reply to: 200 day moving average 257 's message, "Year 257 (CCLVII) was a common year starting on Thursday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Valerianus and Gallienus" on Monday, November 29, 09:15:23pm

Please read:
A personal appeal from
Wikipedia founder Jimmy Wales 257 (number)
From Wikipedia, the free encyclopediaJump to: navigation, search
This article does not cite any references or sources.
Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (December 2009)

257 is the natural number between 256 and 258. It is also a prime number.

← 256258 →257
← 200 210 220 230 240 250 260 270 280 290 →

List of numbers — Integers

← 0 100 200 300 400 500 600 700 800 900 →

Cardinal two hundred [and] fifty-seven
Ordinal 257th
(two hundred [and] fifty-seventh)
Factorization prime
Roman numeral CCLVII
Binary 1000000012
Octal 4018
Duodecimal 19512
Hexadecimal 10116

[edit] In mathematics
257 is a prime number of the form and therefore a Fermat prime. It is currently the second largest known Fermat prime. It is also a Proth prime. And since it is of the form 4n + 1, it is a Pythagorean prime.

It is also an irregular prime, and a long prime (in base 10) and a balanced prime. Since the next prime, 263, is 6 away, 257 is called a sexy prime.

Since 257 + 2 = 259, a semiprime, 257 is a Chen prime. It is also an Eisenstein prime with no imaginary part, and a Pierpont prime.

[edit] In other fields
257 is the country calling code for Burundi. See List of country calling codes.

Retrieved from "http://en.wikipedia.org/wiki/257_(number)"
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Replies:

Monday 23/8/2010 (NT) -- Simply Red Suzzanne/Bodyshop on way to work===257, Monday, November 29, 09:20:02pm