[seqfan] Re: Verification: 13 is or is not a square modulo 26

[israel at math.ubc.ca]

This is correct.

Cheers,
Robert

On Nov 26 2019, Alonso Del Arte wrote:

>Just want to be sure to doublecheck this with at least one other person:
>the nonsquares modulo 26 are 2, 5, 6, 7, 8, 11, 15, 18, 19, 20, 21, 24. So
>13 is not on the list because if x = 13 mod 26, then x^2 = 13 mod 26 also.
>
>Al
>
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