419 (another Prime Pages' Curiosity)
 Curios: Curios Search:   Participate: 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*22n + 1)/3 can never be prime. [Wesolowski]   To link to this page use http://primes.utm.edu/curios/page.php?number_id=1493 Prime Curios! © 1999-2013 (all rights reserved)