241 (number)

241 (two hundred [and] forty-one) is the natural number between 240 and 242. It is also a prime number.

← 240 241 242 →
Cardinaltwo hundred forty-one
Ordinal241st
(two hundred forty-first)
Factorizationprime
Primetwin prime
Greek numeralΣΜΑ´
Roman numeralCCXLI
Binary111100012
Ternary222213
Senary10416
Octal3618
Duodecimal18112
HexadecimalF116

In mathematicsEdit

241 is the larger of the twin primes (239, 241). Twin primes are pairs of primes separated by 2.

241 is a regular prime[1] and a lucky prime.[2]

Since 241 = 15 × 24 + 1, it is a Proth prime.

241 is a repdigit in base 15 (111).

241 is the only known Lucas–Wieferich prime to (U, V) = (3, −1).

In ChemistryEdit

Americium-241 is the most common isotope of Americium, used in smoke detectors.

In popular cultureEdit

  • Reel Big Fish wrote a song entitled "241," where the number is repeated as the only lyric.
  • Another song entitled "241" is sung by Filipino band Rivermaya.

See alsoEdit

ReferencesEdit

  1. ^ "Sloane's A007703 : Regular primes". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.
  2. ^ "Sloane's A031157 : Numbers that are both lucky and prime". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.