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Search: id:A139035
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A139035 Primes p for which 2 is a semiprimitive root, i.e. A006694((p-1)/2)=2 and A064287((p-1)/2)=1. +0
2
7, 23, 47, 71, 79, 103, 167, 191, 199, 239, 263, 271, 311, 359, 367, 383, 463, 479, 487, 503 (list; graph; listen)
OFFSET

1,1

COMMENT

Do there exist primes p for which A064287((p-1)/2)=1 but A006694(p)>2?

REFERENCES

V. Shevelev, On the Newman sum over multiple of a prime with a primitive or semiprimitive root 2, arXiv.org/abs/0710.1354.

CROSSREFS

Cf. A006694, A064287, A001917, A001122, A133954.

Sequence in context: A031371 A000353 A097149 this_sequence A002146 A073577 A139830

Adjacent sequences: A139032 A139033 A139034 this_sequence A139036 A139037 A139038

KEYWORD

nonn

AUTHOR

Vladimir Shevelev (shevelev(AT)bgu.ac.il), May 31 2008, Jun 06 2008

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.


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