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|Cardinal||two hundred and forty-one|
(two hundred and forty-first)
241 is the larger of the twin primes (239, 241).
Prime twins are always of the form (6n - 1, 6n + 1), with n = 1, 2, 3, ... [Thus the set of smallest twin primes is (5, 7).]
Since 241 = 15 × 24 + 1, it is a Proth prime.
241 is a repdigit in base 15 (111).
Americium-241 is the most common isotope of Americium, used in smoke detectors
In popular culture
- Reel Big Fish wrote a song entitled "241," where the number is repeated as the only lyric.
- A short form of the phrase "Two for One" describing a discount.
In professional sports
The seating Section 241 of Nationals Park, the home of the Washington Nationals Major League Baseball team, is known as the National League's rowdiest seating areas, if not the rowdiest in all of baseball.
Fans seated in Section 241, generally single young professionals between the ages of 18 and 35, typically chant "two-four-one! two-four-one!" and often attempt to start the wave. The former has been thought to distract and perplex outfielders of visiting teams.
The section's unique persona is believed to be rooted in the number 241. Regulars of the section are believed to have chosen it because 241, pronounced "two-four-one" sounds similar to the name of the two-for-one special sales of beer at the ballpark.
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