[seqfan] Re: Reference that "A027687 4-perfect numbers" is finite

Max Alekseyev maxale at gmail.com
Mon Jul 16 11:42:51 CEST 2012

I suspect that finiteness of A027687 is not proved but "extremly
probable" as stated at Achim Flammenkamp's page:
(notice the difference between answers "yes and proved" and simply
"yes" in the column "Are all discovered?").

The flag 'fini' is thus inappropriate.


On Sun, Jul 15, 2012 at 6:31 PM, Georgi Guninski <guninski at guninski.com> wrote:
> What is the reference that A027687 is finite?
> Some searches show this as conjecture for k>=3.
> Any reference for k-perfect numbers, k>=4 will do.
> Thanks.
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