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About: 281 (number)

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281 is the 60th prime, twin prime with 283, Sophie Germain prime, sum of the first fourteen primes, sum of seven consecutive primes (29 + 31 + 37 + 41 + 43 + 47 + 53), Chen prime, Eisenstein prime with no imaginary part, centered decagonal number. 281 is the smallest prime p such that the decimal period length of the reciprocal of p is (p−1)/10, i.e. the period length of 1/281 is 28. However, in binary, it has period length 70. The generalized repunit number is composite for all prime p < 60000.

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dbo:abstract
  • Dvě stě osmdesát jedna je přirozené číslo, které následuje po čísle dvě stě osmdesát a předchází číslu dvě stě osmdesát dva. Římskými číslicemi se zapisuje CCLXXXI. (cs)
  • 281 هو عدد صحيح طبيعي بين 280 و 282 (ar)
  • Το 281 (διακόσια ογδόντα ένα) είναι φυσικός αριθμός μετά το 280 και πριν το 282. (el)
  • 281 is the 60th prime, twin prime with 283, Sophie Germain prime, sum of the first fourteen primes, sum of seven consecutive primes (29 + 31 + 37 + 41 + 43 + 47 + 53), Chen prime, Eisenstein prime with no imaginary part, centered decagonal number. 281 is the smallest prime p such that the decimal period length of the reciprocal of p is (p−1)/10, i.e. the period length of 1/281 is 28. However, in binary, it has period length 70. The generalized repunit number is composite for all prime p < 60000. (en)
  • Berrehun eta laurogeita bat (281) berrehun eta laurogeiaren ondoren eta berrehun eta laurogeita biaren aurretik doan zenbaki osoa da. (eu)
  • 281(二百八十一、にひゃくはちじゅういち)は自然数、また整数において、280の次で282の前の数である。 (ja)
  • 281(이백팔십일)은 280보다 크고 282보다 작은 자연수이다. (ko)
  • Duecentottantuno (281) è il numero naturale dopo il 280 e prima del 282. (it)
  • 281 är det naturliga talet som följer 280 och som följs av 282. (sv)
  • 281是280與282之間的自然數。 (zh)
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  • 281 (xsd:integer)
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  • 60 (xsd:integer)
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rdfs:comment
  • Dvě stě osmdesát jedna je přirozené číslo, které následuje po čísle dvě stě osmdesát a předchází číslu dvě stě osmdesát dva. Římskými číslicemi se zapisuje CCLXXXI. (cs)
  • 281 هو عدد صحيح طبيعي بين 280 و 282 (ar)
  • Το 281 (διακόσια ογδόντα ένα) είναι φυσικός αριθμός μετά το 280 και πριν το 282. (el)
  • 281 is the 60th prime, twin prime with 283, Sophie Germain prime, sum of the first fourteen primes, sum of seven consecutive primes (29 + 31 + 37 + 41 + 43 + 47 + 53), Chen prime, Eisenstein prime with no imaginary part, centered decagonal number. 281 is the smallest prime p such that the decimal period length of the reciprocal of p is (p−1)/10, i.e. the period length of 1/281 is 28. However, in binary, it has period length 70. The generalized repunit number is composite for all prime p < 60000. (en)
  • Berrehun eta laurogeita bat (281) berrehun eta laurogeiaren ondoren eta berrehun eta laurogeita biaren aurretik doan zenbaki osoa da. (eu)
  • 281(二百八十一、にひゃくはちじゅういち)は自然数、また整数において、280の次で282の前の数である。 (ja)
  • 281(이백팔십일)은 280보다 크고 282보다 작은 자연수이다. (ko)
  • Duecentottantuno (281) è il numero naturale dopo il 280 e prima del 282. (it)
  • 281 är det naturliga talet som följer 280 och som följs av 282. (sv)
  • 281是280與282之間的自然數。 (zh)
rdfs:label
  • 281 (عدد) (ar)
  • 281 (číslo) (cs)
  • 281 (αριθμός) (el)
  • 281 (number) (en)
  • Berrehun eta laurogeita bat (eu)
  • 281 (numero) (it)
  • 281 (ko)
  • 281 (ja)
  • 281 (tal) (sv)
  • 281 (zh)
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