# 419

This number is a prime.

The Nigerian Advance Fee Scheme (also known internationally as "4-1-9" fraud after the section of the Nigerian penal code which addresses fraud schemes) is generally targeted at small and medium sized businesses, as well as charities. [Croll]

Dutch microscopy pioneer and naturalist Anton van Leeuwenhoek (1632-1723) ground a total of 419 lenses during his life. [Oakes]

419 is the smallest number which when divided by 2, 3, 4, 5, 6 and 7 leaves remainders of 1, 2, 3, 4, 5 and 6 respectively. It is also interesting to note that 419 is one less than the least common multiple of the first 7 integers. [Tryczak]

419 is a Sophie Germain prime, since 2 * 419 + 1 = 839, which is prime. Note that it is the 22nd Sophie Germain prime, and 22 = 2 * 11 is the product of two Sophie Germain primes. [Carmichael]

419, 41, and 19 are all primes. The reversals of 419, 41, and 19 are all semiprimes. [Poo Sung]

Milligrams of potassium in one-half cup cooked spinach. [Karcher]

(419*2^{2n} + 1)/3 can never be prime. [Wesolowski]

The position of the largest term ("mille") in a dictionary that lists the first thousand numbers alphabetically in French. [Beedassy]

Big Bertha was a 419 mm howitzer used by Germany in the first world war.

Largest n up to which Eulers famous polynomial n^2+n+41 generates primes or semiprimes only. [Gupta]

419 West is a traditional American restaurant in Roanoke, Virginia.

In China, the number “419” is a codeword for “one night stand” because it's an approximate homonym for “for one night.”

The 419th decade is the first that has exactly three brilliant years (4183, 4187, and 4189). [Gaydos]

A jury in Virginia recommended that neo-Nazi James Alex Fields Jr., be given a sentence of life in prison plus an additional 419 years.

419 Holistics is an Atlanta based company that strives to be the premier hemp/cannabis company in the south. [Buskey]

The smallest prime number for which the concatenation of the numbers in its Collatz Sequence is a prime. [Gaydos]

The beginning of four consecutive prime numbers that contain two pairs of twins: {419, 421} and {431, 433}. [Bergot]