291 (number)
From HandWiki
Short description: Natural number
| ||||
---|---|---|---|---|
Cardinal | two hundred ninety-one | |||
Ordinal | 291st (two hundred ninety-first) | |||
Factorization | 3 × 97 | |||
Divisors | 1, 3, 97, 291 | |||
Greek numeral | ΣϞΑ´ | |||
Roman numeral | CCXCI | |||
Binary | 1001000112 | |||
Ternary | 1012103 | |||
Quaternary | 102034 | |||
Quinary | 21315 | |||
Senary | 12036 | |||
Octal | 4438 | |||
Duodecimal | 20312 | |||
Hexadecimal | 12316 | |||
Vigesimal | EB20 | |||
Base 36 | 8336 |
291 is the natural number following 290 and preceding 292.
In mathematics
- 291 is an odd composite number with two prime factor.[1]
- 291 is a semiprime number meaning that it has 2 prime factors.[2]
- 291 can be written as the sum of the nth prime plus n. It is the 52nd prime (239) plus 52.[3]
- 291 is one of the positions of “c” in the tribonacci word abacabaab… defined by a->ab, b->ac, c->a.[4]
- 291 is the sum of 6 different 4th powers. It is the sum of 44+24+24+14+14+14.[5]
World Records
- On March 6, 2022, Tamara Walcott received the Guinness World Record for the elephant bar deadlift achieved by a woman. She lifted a weight of 291 kg.[6]
- On December 19, 2021, the greatest number of cakes eaten online simultaneously was achieved in Tanba, Japan. There were 291 cakes.[7]
- On October 25, 2014, the longest string instrument was created in Singapore. It was the ‘Earth Harp’ at a length of 291 m.[8]
- On August 7, 2011, Fred Grsybowski achieved the Guinness World Record for the tallest usable pogo stick in Toronto. It was 2.91 m tall.[9]
Other fields
- The calendar years 291 AD and 291 BC.
- 291 is the number for several highways across the countries of Canada , Japan , and the United States .
- 291 Alice is an asteroid in the asteroid belt. It was discovered by Johann Palisa in Vienna, Austria.[10]
References
- ↑ "Facts about the integer". https://mathworld.wolfram.com/CompositeNumber.html.
- ↑ "Semiprime". https://mathworld.wolfram.com/Semiprime.html.
- ↑ Sloane, N. J. A., ed. "Sequence A014688". OEIS Foundation. https://oeis.org/A014688.
- ↑ Sloane, N. J. A., ed. "Sequence A003146 (Positions of letter c in the tribonacci word abacabaabacababac... generated by a->ab, b->ac, c->a (cf. A092782))". OEIS Foundation. https://oeis.org/A003146.
- ↑ Sloane, N. J. A., ed. "Sequence A003340 (Numbers that are the sum of 6 positive 4th powers)". OEIS Foundation. https://oeis.org/A003340.
- ↑ "291 kg elephant bar deadlift". https://www.guinnessworldrecords.com/world-records/632299-heaviest-elephant-bar-deadlift-female.
- ↑ "291 cakes eaten online". https://www.guinnessworldrecords.com/world-records/678773-most-people-eating-cakes-online%c2%a0simultaneously.
- ↑ "291 m long string instrument". https://www.guinnessworldrecords.com/world-records/118293-longest-stringed-instrument.
- ↑ "2.91 m tall usable pogo stick". https://www.guinnessworldrecords.com/world-records/95995-tallest-useable-pogo-stick.
- ↑ "291 Alice". 27 March 2019. https://www.universeguide.com/asteroid/940/alice.
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Original source: https://en.wikipedia.org/wiki/291 (number).
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