## Conjecture on 3-Carmichael Numbers of the Form (4h+1)(4j+1)(4k+1)

**Authors:** Marius Coman

In this paper I conjecture that for any 3-Carmichael number (absolute Fermat pseudoprime with three prime factors, see the sequence A087788 in OEIS) of the form (4*h + 1)*(4*j + 1)*(4*k + 1) is true that h, j and k must share a common factor (in fact, for seven from a randomly chosen set of ten consecutive, reasonably large, such numbers it is true that both j and k are multiples of h). The conjecture is probably true even for the larger set of 3-Poulet numbers (Fermat pseudoprimes to base 2 with three prime factors, see the sequence 215672 in OEIS).

**Comments:** 2 Pages.

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### Submission history

[v1] 2017-01-24 00:00:25

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