{Spam?} A105875 = A105899

[Don Reble]

Andrew, seqfans:

> %N A105875 Primes for which -3 is a primitive root.
> %C A105875 When (if ever) does this differ from A105899?
>            - Andrew Plewe, Jul 23 2007
>
> %N A105899 Primes for which -27 is a primitive root.

    -27 = (-3)^3, so -27 is a primitive root just when
        -3 is a primitive root, and
        the prime is not 3k+1.
    Now, if -3 is a primitive root, then -3 is not a quadratic residue,
    and so the prime is not 3k+1. The first condition implies the
    second, and the sequences are identical.

-- 
Don Reble  djr at nk.ca


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I'm back from my trip.  I've more or less caught up 
on new sequences.  I have several hundred "Comments"

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Thanks as always to everyone who has contributed sequences,
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Best regards

Neil