## Two Conjectures on Novak-Carmichael Numbers

**Authors:** Marius Coman

In this paper I make the following two conjectures on Novák-Carmichael numbers: (1) There exist an infinity of Novák-Carmichael numbers of the form (30n + p)*(30n + q) – p*q for any [p, q] distinct primes of the form 6k + 1; (2) There exist an infinity of Novák-Carmichael numbers of the form (30n + p)*(30n + q) - p*q for any [p, q] distinct primes of the form 6k – 1, where k > 1. See the sequence A124240 in OEIS for Novák-Carmichael numbers (numbers n such that a^n ≡ 1 (mod n) for every a coprime to n).

**Comments:** 2 Pages.

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### Submission history

[v1] 2017-10-31 03:21:01

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