241 (two hundred [and] forty-one) is the natural number between 240 and 242. It is also a prime number.
In mathematics
- 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.[3]
- 241 is a repdigit in base 15 (111).
- 241 is the only known Lucas–Wieferich prime to (U, V) = (3, −1).
References
- ^ “Sloane’s A007703 : Regular primes”. The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.
- ^ “Sloane’s A031157 : Numbers that are both lucky and prime”. The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-28.
- ^ Sloane, N. J. A. (ed.). “Sequence A080076 (proth primes)”. The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
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