The second unique prime in hexadecimal (base 16).
The prime numbers are identified as N0241 in Sloane's original "Handbook of Integer Sequences."
The smallest prime p such that p plus the reversal of p equals a palindromic prime. [Luhn]
Internationally renowned researcher Dr. Karen Rogers did a study of 241 profoundly gifted children in 1994-1995 during a postdoctoral fellowship. It was especially useful to parents who had observed developmental differences in their children but were unaware of what those differences may signify.
The smallest duodecimal prime: p = (x^12 + y^12 )/(x^4 + y^4 ). [Russo]
The smallest non-palindromic prime which can be expressed as sum of a number and its reverse, i.e., 241 = 170 + 071. [Gupta]
The system of equations:
2w + 3x + 5y + 7z = 11;
13w + 17x + 19y + 23z = 29;
31w + 37x + 41y + 43z = 47;
53w + 59x + 61y + 67z = 71;
has four fractions as its solution, each of which has denominator 241. [Rupinski]
The smallest prime p such that the concatenation of p in base 10 down up to base 2 is prime. [Russo]
The smallest prime p such that p7 can be written as the sum of 7 consecutive primes. Note that 2 + 4 + 1 = 7. [Rivera]
The radioisotope americium-241 is used in many smoke detectors.
The smallest prime value (out of 14) resulting from the ninedigital
fraction equation (A/B)^C + (D/E)^F + (G/H)^I, where the letters A to I
represent any combination of the nine digits 1 through 9. Note that (6/3)^5 +
(8/4)^7 + (9/1)^2 and (6/3)^7 + (8/4)^5 + (9/1)^2 are the only two
distinct solutions for 241. [De Geest]
241 is the only number m such that prime(m) =  (m * (m)). [Firoozbakht]
The United States Supreme Court case Chesapeake & Ohio Railway Company v. Asa P. Carnahan can be found on Page 241 of Volume 241.
This easy-to-remember member of a twin prime pair is pronounced, "two for one." Get it?
241 = prime(prime(2!!*4!!*1!!)). [Javadifar]
IXL (The Web's #1 Math Practice Site) contains 241 sixth-grade skills.
There are 241 known numbers that cannot be written as the
sum of at most four tetrahedral
numbers. [Capelle]
The largest known prime p such that the reversal of (p! + p) is
prime. [Firoozbakht]
Washington D.C. schools chancellor Michelle Rhee once fired
241 teachers at the same time.
If A = 1, B = 2, C = 3, ... , Z = 26, then 'THE RIEMANN HYPOTHESIS' is prime. [Homewood]
(There are 4 curios for this number that have not yet been approved by an editor.) To link to this page use http://primes.utm.edu/curios/page.php?number_id=769
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