Euler's "lucky" numbers are positive integers n such that for all integers k with 1 ≤ k < n, the polynomial k2 − k + n produces a prime number. == Characteristics == When k is equal to n, the value cannot be prime since n2 − n + n = n2 is divisible by n.
Euler's "lucky" numbers are positive integers n such that for all integers k with 1 ≤ k < n, the polynomial k2 − k + n produces a prime number. == Characteristics == When k is equal to n, the value cannot be prime since n2 − n + n = n2 is divisible by n.
Source: Wikipedia "Lucky numbers of Euler" · CC BY-SA 4.0
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