This month's riddle deals with a well-known result in number theory. As always,
we ask for original solutions only, not ones based on prior familiarity
with the proof or on Internet searching.
In number theory, a
28, specifically, is a number that can be represented in a special form, namely
it can be represented as (
Consider, now, another special form, which we will call "Special Form B". It
is (2 This month's riddle: prove that all perfect numbers must be either of special form A or of special form B. |
## List of solvers:Oded Margalit (3 May 14:58)Dan Dima (5 May 00:02) Albert Stadler (7 May 21:20) James Ge (14 May 17:56) Itsik Horovitz (19 May 07:58) |

Elegant solutions can be submitted to the puzzlemaster at __riddlesbrand.scso.com__.
Names of solvers will be posted on this page. Notify if you don't want
your name to be mentioned.

The solution will be published at the end of the month.

Enjoy!