In mathematics, a Lucas–Carmichael number is a positive composite integer n such that If p is a prime factor of n, then p + 1 is a factor of n + 1; n is odd and square-free. The first condition resembles Korselt's criterion for Carmichael numbers, where −1 is replaced with +1.
In mathematics, a Lucas–Carmichael number is a positive composite integer n such that If p is a prime factor of n, then p + 1 is a factor of n + 1; n is odd and square-free. The first condition resembles Korselt's criterion for Carmichael numbers, where −1 is replaced with +1.
Source: Wikipedia "Lucas–Carmichael number" · CC BY-SA 4.0
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