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・ 1986–87 Women's IHF Cup
・ 1986–87 Wyoming Cowboys basketball team
・ 1986–87 Yugoslav Cup
・ 1986–87 Yugoslav First Basketball League
・ 1986–87 Yugoslav First League
・ 1986–87 Yugoslav Ice Hockey League season
・ 1986–87 Yugoslav Second League
・ 1986–88 French nuclear tests
・ 1986–90 Philippine coup attempts
・ 1987
・ 1987 (artist)
・ 1987 (disambiguation)
・ 1987 (Fibes, Oh Fibes! album)
・ 1987 (film)
・ 1987 (Naser Mestarihi album)
1987 (number)
・ 1987 (song)
・ 1987 (What the Fuck Is Going On?)
・ 1987 1. deild
・ 1987 1. deild karla
・ 1987 1000 km of Brands Hatch
・ 1987 1000 km of Fuji
・ 1987 1000 km of Jerez
・ 1987 1000 km of Monza
・ 1987 1000 km of Nürburgring
・ 1987 1000 km of Silverstone
・ 1987 1000 km of Spa
・ 1987 200 Miles of Norisring
・ 1987 24 Hours of Le Mans
・ 1987 360 km of Jarama


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1987 (number) : ウィキペディア英語版
1987 (number)

1987 is the natural number following 1986 and preceding 1988.
==In mathematics==
1987 is an odd number and the 300th prime number. It starts the sexy prime triplet (1987, 1993, 1999). Being of the form 4''n'' + 3, it is a Gaussian prime. It is a lucky number and therefore also a lucky prime. 1987 is a prime factor of the 9th number in Sylvester's sequence, and is the 15th prime to divide any number in the sequence.
There are 1987 polyiamonds with 12 cells that tile the plane isohedrally.〔.〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「1987 (number)」の詳細全文を読む



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