264 (number)

260

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

List of numbers — Integers

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

two hundred sixty

260th
(two hundred and sixtieth)

2²× 5 × 13

CCLX

100000100₂

100122₃

10010₄

2020₅

1112₆

404₈

198₁₂

104₁₆

D0₂₀

78₃₆

260 (two hundred [and] sixty) is the magic constant of the n×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.

261 = 3²·29, lucky number, nonagonal number, Harshad number, unique period in base 2, number of possible unfolded tesseract patterns. 261 is the lowest number not to have its own page, this making it a candidate for the lowest Uninteresting Number according to the definition given by Alex Bellos.

262 = 2·131, meandric number, open meandric number, untouchable number, happy number, palindrome number, semiprime

263 has its own article. 263 is a prime, safe prime, happy number, sum of five consecutive primes (43 + 47 + 53 + 59 + 61), balanced prime, Chen prime, Eisenstein prime with no imaginary part, strictly non-palindromic number, Bernoulli irregular prime, Euler irregular prime, Gaussian prime, full reptend prime, Solinas prime, Ramanujan prime.

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Wikipedia

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