## Three Conjectures Regarding Poulet Numbers and Harshad Numbers

**Authors:** Marius Coman

In this paper I make the following three conjectures: (I) If P is both a Poulet number and a Harshad number, than the number P – 1 is also a Harshad number; (II) If P is a Poulet number divisible by 5 under the condition that the sum of the digits of P – 1 is not divisible by 5 than P – 1 is a Harshad number; (III) There exist an infinity of Harshad numbers of the form P – 1, where P is a Poulet number.

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### Submission history

[v1] 2016-11-11 15:58:33

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