While working on a nBAB for the number 43, MathBabbler noticed that 43 was a "twin prime" of number 41.

MathBabbler Number Analyst (MBNA) output: ========================================= 41 is a natural, whole, integer 41 is odd 41 is unhappy 41 is not a Harshad number 41 is prime ...Cousin prime with 37 ...Sexy prime with 47 ...Sophie Germain prime with 83 ...Twin prime with 43 ...Pythagorean ...Super ...prime triplet {37, 41, 43} ...prime triplet {41, 43, 47} 41 is undulating 41 in octal is 051 41 in hexadecimal is 0x29 41 in binary is 101001 (is odious) 41 nearest square numbers: -5...8 (36 [6]...49 [7]) sqrt(41) = 6.40312 ln(41) = 3.71357 log(41) = 1.61278 41 reciprocal is .02439024390243902439024390243902 41! is 3.34525e+49 41 is 13.0507 Pi years 41 is 2 score and 1 year

`written as a Roman numeral is`

41`.`

XLIWikipedia tidbits...

4^{2}+ 5^{2}= 41 # sum of two squares 2 + 3 + 5 + 7 + 11 + 13 = 41 # sum of 1st six primes 11 + 13 + 17 = 41 # sum of three consecutive primes ??? adding up the sums of divisors for 1 through 7 yields 41 ???Another Wikipedia tidbit...

Euler first noticed (in 1772) that the quadratic polynomialP(n) = nis prime for all non-negative integers less than 40. The primes for n = 0, 1, 2, 3... are 41, 43, 47, 53, 61, 71... The differences between the terms are 2, 4, 6, 8, 10... For n = 40, it produces a square number, 1681, which is equal to 41 * 41, the smallest composite number for this formula. In fact if 41 divides n it divides P(n) too.^{2}+ n + 41MathBabbler created this nBAB when he was 51 years young. 51 in base-8 (octal) equals

`.`

41This nBAB about the number

`was created as a result of creating a nBAB about the number`

41`and the average of`

43`and`

41`is`

43`(i.e. the "Answer to Life, the Universe, and Everything")`

42The Wikipedia claims the phrase "let it be" is sang

`times in the song "Let It Be."`

41Added a song titled

`by the Dave Matthews Band to Songs With Numbers in Their Titles.`

#41

**Creator:** Gerald Thurman
[gthurman@gmail.com]

**Created:** 23 November 2008 (nBAB# 76; BAB# 1924)

This work is licensed under a Creative Commons Attribution 3.0 United States License.