# 260 (number)

﻿
260 (number)

260 (two hundred [and] sixty) is the magic constant of the "n"&times;"n" normal magic square and n-Queens Problem for n = 8, the size of an actual chess board.

260 is also the magic constant of the Franklin magic square devised by Benjamin Franklin.

The minor diagonal gives 260, and in addition a number of combinations of two half diagonals of four numbers from a corner to the center give 260.

260 may also refer to the years AD 260 and 260 BC.

Other numbers from 261 to 269

Two hundred [and] sixty-one 261 = 32·29, nonagonal number, Harshad number----Two hundred [and] sixty-one 261 is the number of possible unfolded tesseract patterns----Two hundred [and] sixty-two 262 = 2·131, meandric number, open meandric number, untouchable number----Two hundred [and] sixty-three 263 prime, safe prime, sum of five consecutive primes (43 + 47 + 53 + 59 + 61), balanced prime, Chen prime, Eisenstein prime with no imaginary part, strictly non-palindromic number----Two hundred [and] sixty-four 264 = 23·3·11, Harshad number----Two hundred [and] sixty-five 265 = 5·53, Padovan number, centered square number, Smith number, subfactorial 6. It's the 666th decimal of Pi in base 666, making it a hyper-evil number.----Two hundred [and] sixty-six 266 = 2·7·19, sphenic number, Harshad number, nontotient, noncototient, self number, repdigit in base 11 (222).----Two hundred [and] sixty-seven 267 = 3·89, the number of groups of order 64, see [http://www-public.tu-bs.de:8080/~beick/soft/small/small.html] .----Two hundred [and] sixty-eight 268 = 22·67, noncototient, untouchable number----Two hundred [and] sixty-nine 269 prime, twin prime with 271, sum of three consecutive primes (83 + 89 + 97), Chen prime, Eisenstein prime with no imaginary part, highly cototient number, strictly non-palindromic number

Wikimedia Foundation. 2010.

### Look at other dictionaries:

• 260 (число) — 260 двести шестьдесят 257 · 258 · 259 · 260 · 261 · 262 · 263 230 · 240 · 250 · 260 · 270 · 280 · 290 Факторизация …   Википедия

• .260 Remington — Infobox Firearm Cartridge name= .260 Remington caption= .260 Remington cartridge with a 120 grain Remington Cor Lokt bullet.|origin= United States type= Rifle service= used by= wars= designer= design date= manufacturer= Remington Arms Company… …   Wikipedia

• Number 1's (Mariah Carey album) — The correct title of this article is #1 s (Mariah Carey album). The substitution or omission of the # sign is because of technical restrictions. #1 s …   Wikipedia

• Number 1's (album de Mariah Carey) — #1 s Compilation par Mariah Carey Sortie 17 novembre 1998[1] Enregistrement 1988 1998 …   Wikipédia en Français

• 206 (number) — Number|number = 206 range = 200s cardinal = two hundred [and] six ordinal = th ordinal text = two hundred [and] sixth numeral = factorization = 2 imes 103 prime = divisor = 1, 2, 103, 206 roman = CCVI unicode = greek prefix = latin prefix = bin …   Wikipedia

• Wikipedia:List of Wikipedians by number of edits — Shortcuts: WP:NOE WP:WBE WP:EDITS WP:MOSTEDITS This is a list of Wikipedians ordered by number of edits in the English language Wikipedia. Edits in all namespaces are counted; deleted edits have been included in recent versions. Click… …   Wikipedia

• Bundesstraße 260 — Basisdaten Gesamtlänge: 64 km Bundesländer: Rheinland Pfalz Hesse …   Deutsch Wikipedia

• USS Betelgeuse (AK-260) — USS Betelgeuse AK (FBM) 260 was the last of the AK s or cargo ships in service in the United States Navy. hip s historyConstruction and early career Betelgeuse was constructed by the California Shipbuilding Company, Los Angeles, California and… …   Wikipedia

• Aermacchi SF.260 — SF.260 Aermacchi SF.260 Role Trainer Light attack …   Wikipedia

• List of countries by number of troops — This is a list of countries by number of troops. It includes any government sponsored troops used to further the domestic and foreign policies of their respective government. The term country is used in the sense of state which exercises… …   Wikipedia