Английская Википедия:287 (number)
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287 is the natural number following 286 and preceding 288.
In mathematics
- 287 is an odd composite number with 2 prime factors.[1]
- 287 is the sum of consecutive primes in three different ways, 89+97+101, 43+53+59+61+67, and 17+19+23+29+31+37+41+43+47
- 287 is a pentagonal number which follows the concept of triangular numbers.[2]
- 287 is an odd semiprime number.[3]
- 287 is the sum of exactly 4 nonzero squares.[4]
- 287 is a number where 2(287)-1 and 2(287)+1 are both prime.[5]
World Records
- On November 15, 2012, in the United Kingdom, the largest toy construction lesson was achieved with 287 participants.[6]
- On August 8, 2018, in Japan, the largest blind soccer (football) lesson was completed with 287 members.[7]
- On February 28, 2020, the largest Welsh folk dance was completed in Swansea in the United Kingdom. There were 287 participants.[8]
- On June 20, 2009, Bora Milutinović completed the Guinness World Record for the greatest number of international soccer matches a coach has been in charge of. He was at 287 games.[9]
- On December 20, 2020, the largest group of people dressed as the sun was completed in Guangzhou, China. There were 287 participants.[10]
Other fields
- The calendar years 287 AD and 287 BC.
- 287 is the number of several highways in Brazil, Canada, Japan, and the United States.
- 287 Nephthys is an S-type asteroid in the asteroid belt. It was discovered by Christian Heinrich Friedrich Peters in Clinton, Oneida County, New York. It was named after Nephthys in Egyptian mythology.[11]
References
Шаблон:Reflist Шаблон:Integers
