Thread
:
Prove that an integer with digits '1' is not a perfect square.
View Single Post
matt grime
#
35
May19-07, 07:05 AM
Sci Advisor
HW Helper
P: 9,398
For mikeyflex: every prime not equal to 2 or 3 is of the form 6m+1 or 6m-1 for some integer m. This completely explains your observation.