User blog:MinersHavenM43/Apparent Multiples

An Apparent Multiple is a kind of multiple that has the same logic as the three and nine multiple strategy.

Apparent Multiples can be defined as:

$$AM_\mathbb{M}=\sum_{d=-\infty}^{\infty}\operatorname{floor}\left(\operatorname{mod}\left(\frac{\mathbb{M}_2}{10^{d}},10\right)\right)=\mathbb{M}_3\mathbb{M}$$

In which $$\mathbb{M}$$, $$\mathbb{M}_2$$ and $$\mathbb{M}_3$$ can be different and are positive real integers.

Examples:

AM20 = 299, 398, 99994, 6666673, etc.

AM10 = 19, 28, 37, 109, 217, 992, 26, 1126, etc.

Fun fact: 231 (2 147 483 648) could be Apparently Prime, because that number is an Apparent Multiple of 47 (prime).