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A191080 Primes p that have Kronecker symbol (p|78) = -1. 1

%I

%S 5,7,11,17,23,31,43,59,61,73,83,97,113,139,149,151,157,181,191,193,

%T 197,211,223,227,233,241,257,263,271,277,283,293,311,317,373,409,457,

%U 461,463,487,503,509,521,523,547,557,569,571,577,587,599,631,641,647

%N Primes p that have Kronecker symbol (p|78) = -1.

%C Originally erroneously named "Primes that are not squares mod 78". - _M. F. Hasler_, Jan 18 2016

%H Vincenzo Librandi, <a href="/A191080/b191080.txt">Table of n, a(n) for n = 1..1000</a>

%t Select[Prime[Range[200]], JacobiSymbol[#,78]==-1&]

%o (MAGMA) [p: p in PrimesUpTo(647) | KroneckerSymbol(p, 78) eq -1]; // _Vincenzo Librandi_, Sep 11 2012

%K nonn,easy

%O 1,1

%A _T. D. Noe_, May 25 2011

%E Definition corrected, following a suggestion from _David Broadhurst_, by _M. F. Hasler_, Jan 18 2016

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Last modified September 19 15:57 EDT 2020. Contains 337178 sequences. (Running on oeis4.)