19

This number is a prime.

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The smallest prime which is the sum of two semiprimes in two different ways. [Post]

"Let me tell you how it will be. There's one for you, 19 for me." Lyrics by George Harrison from the song "Taxman" by The Beatles. [Post]

Charles Darwin produced 19 works: 15 books and 4 monographs. Ref: What Darwin Really Said, Benjamin Farrington, preface by Stephen Jay Gould, NY: Schocken, 1982, p.xvi. [Post]

19 is the smallest prime which is the sum of three discrete composites (4 + 6 + 9). [Post]

Appears to be the largest of the set of primes that cannot be represented as the sum of four distinct primes {2,3,5,7,11,13,19}. [Post]

0nly the first 19 places of Mascheroni's calculation of Euler's constant were correct. [Post]

Gauss gave a sufficient condition for a regular n-gon to be constructible when he was only 19 years old. [Post]

"19th Nervous Breakdown" is a song written by Mick Jagger and Keith Richards . [Post]

The largest prime strobogrammatic palindromic number in its Roman numeral representation. [Post]