A191070 Primes p that have Kronecker symbol (p|39) = -1.

7, 17, 19, 23, 29, 31, 37, 53, 67, 73, 97, 101, 107, 109, 113, 131, 151, 163, 173, 179, 191, 193, 223, 229, 233, 241, 251, 257, 263, 269, 271, 307, 311, 331, 347, 349, 379, 389, 397, 409, 419, 421, 443, 457, 463, 467, 487, 491, 499, 503, 521, 541, 563, 569

Offset: 1

Author

T. D. Noe, May 25 2011

Keywords

• nonn
• easy

Comments

Originally erroneously named "Primes that are not squares mod 39", which contains this as a subsequence. - M. F. Hasler, Jan 18 2016

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Programs

Magma

[p: p in PrimesUpTo(569) | KroneckerSymbol(p, 39) eq -1]; // Bruno Berselli, Sep 11 2012

Mathematica

Select[Prime[Range[200]], JacobiSymbol[#,39]==-1&]

Extensions

Definition corrected, following a suggestion from David Broadhurst, by M. F. Hasler, Jan 18 2016