フォーチュン数
1. Fortunate numberA Fortunate number, named after Reo Fortune, for a given positive integer n is the smallest integer m > 1 such that pn# + m is a prime number, where the primorial pn# is the product of the first n prime numbers. For example, to find the seventh Fortunate number, one would first calculate the product of the first seven primes (2, 3, 5, 7, 11, 13 and 17), which is 510510. Adding 2 to that gives another even number, while adding 3 would give another multiple of 3.
Read “Fortunate number” on English Wikipedia
Read “フォーチュン数” on Japanese Wikipedia
Read “Fortunate number” on DBpedia
Read “Fortunate number” on English Wikipedia
Read “フォーチュン数” on Japanese Wikipedia
Read “Fortunate number” on DBpedia
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