Lucas-Carmichael Number/Examples/399

Example of Lucas-Carmichael Number
$399$ is a Lucas-Carmichael number:
 * $p \mathrel \backslash 399 \implies \left({p + 1}\right) \mathrel \backslash 400$

Proof
We have that:
 * $399 = 3 \times 7 \times 19$

Then: