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・ Rough Justice (novel)
・ Rough Justice (Porridge)
・ Rough Justice (The Rolling Stones song)
・ Rough Justice (TV series)
・ Rough Lake
・ Rough Landing, Holly
・ Rough lemon
・ Rough longnose dogfish
・ Rough Magic
・ Rough Mix
・ Rough Mountain Wilderness
・ Rough music
・ Rough Night in Jericho
・ Rough Night in Jericho (album)
・ Rough Night in Jericho (film)
Rough number
・ Rough Opinion
・ Rough pasture
・ Rough path
・ Rough pigtoe pearly mussel
・ Rough Play
・ Rough Point
・ Rough Prominent
・ Rough Quest
・ Rough Racer
・ Rough ride
・ Rough Ride (book)
・ Rough ride (police brutality)
・ Rough Rider (film)
・ Rough Rider Award


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Rough number : ウィキペディア英語版
Rough number
A ''k''-rough number, as defined by Finch in 2001 and 2003, is a positive integer whose prime factors are all greater than or equal to ''k''. ''k''-roughness has alternately been defined as requiring all prime factors to strictly exceed ''k''.〔p. 130, Naccache and Shparlinski 2009.〕
==Examples (after Finch)==
#Every odd positive integer is 3-rough.
#Every positive integer that is congruent to 1 or 5 mod 6 is 5-rough.
#Every positive integer is 2-rough, since all its prime factors, being prime numbers, exceed 1.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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