179

This number is a prime.

+ Bobby Fischer issued a multipage document with 179 demands to the World Chess Federation (FIDE) before defaulting his title to Anatoly Karpov in 1975. [Edmonds and Eidinow]

+ There are 179 even days in one year. [Kik]

+ 179 = (17 * 9) + (17 + 9). [Capelle]

+ Any given Major League Baseball team may potentially play 179 games in a given season (162 regular season games + maximally 17 post-season games). [Rupinski]

+ A winning solution to the 15-hole triangular peg solitaire game is: (4,1), (6,4), (15,6), (3,10), (13,6), (11,13), (14,12), (12,5), (10,3), (7,2), (1,4), (4,6), (6,1). The term (x,y) means move the peg in hole x to y. Not only does this solution leave the final peg in the original empty hole, but the sum of the peg holes in the solution is prime.

+ Hafnium-179 is the stable nuclide with the largest quadrupole moment.

+ The only non-titanic prime (emirp) of the form p = 7^x + x^7 + x, where x is a prime (x=2). [Loungrides]

+ (179/971)(971/179) = -1, where ( / ) is the Legendre symbol. No smaller emirp has this property. [Poo Sung]

+ 179 * 971 + 179 + 971 is prime (also emirp). No smaller emirp produces a prime in this manner. [Poo Sung]

+ Minuscule 179 (in the Gregory-Aland numbering) is a Greek minuscule manuscript of the New Testament.

+ 'Prime numbers are what is left when you have taken all the patterns away. I think prime numbers are like life. They are very logical but you could never work out the rules even if you spent all your time thinking about them.' is a 179-letter quote from a book called The Curious Incident of the Dog in the Night-time by Mark Haddon. The quote also contains 43 words. All the chapters are numbered using prime numbers. [Homewood]

+ Between the beginning and the 179th digit of π, an equal number of five different decimal digits occur (there are 18 each of the digits 0, 3, 4, 5, and 9). Mike Keith conjectures this to be the last digit of π for which this happens (there are no others up to 10^9 digits).

+ The smallest prime whose square is a Cyclops number. [Pol]

+ The sum of all the double-digit primes, each consisting of successive digits in ascending order, is an emirp, i.e., 23 + 67 + 89 = 179. Note that the concatenation of these three primes in descending order, i.e., 896723 is a prime. [Loungrides]

+ The impact crater Chebyshev on the far side of the moon is at least 179 kilometers in diameter. Named in honor of Pafnuty Chebyshev, who is considered to be a founding father of Russian mathematics.

+ The 179th strobogrammatic number (910016) and 179 have the same sum of digits. [Gaydos]

+ There are exactly 666 digits in the first 179 Sophie Germain primes. [Gaydos]

+ If A = 1, B = 2, C = 3..., Z = 26, then 'GARLAND LEE HONAKER JR' is prime. [Homewood]

+ The body of Himantarium gabrielis is yellowish to orange in color and has up to 179 segments. [Green]

(There are 17 curios for this number that have not yet been approved by an editor.)

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