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Revision History for A107158

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A107158

Primes of the form 3x^2 + 17y^2.
(history; published version)

#18 by Charles R Greathouse IV at Thu Feb 09 16:24:51 EST 2017

STATUS

editing

approved

#17 by Charles R Greathouse IV at Thu Feb 09 16:24:48 EST 2017

NAME

Primes of the form 3x^2 + 17y^2.

COMMENTS

Discriminant = -204. See A107132 for more information.

PROG

(PARI) list(lim)=my(v=List(), w, t); for(x=0, sqrtint(lim\3), w=3*x^2; for(y=0, sqrtint((lim-w)\17), if(isprime(t=w+17*y^2), listput(v, t)))); Set(v) \\ Charles R Greathouse IV, Feb 09 2017

STATUS

approved

editing

#16 by OEIS Server at Sat Aug 09 11:29:32 EDT 2014

LINKS

Vincenzo Librandi and Ray Chandler, <a href="/A107158/b107158_1.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi]

#15 by Ray Chandler at Sat Aug 09 11:29:32 EDT 2014

STATUS

editing

approved

Discussion

Sat Aug 09

11:29

OEIS Server: Installed new b-file as b107158.txt.  Old b-file is now b107158_1.txt.

#14 by Ray Chandler at Sat Aug 09 11:29:28 EDT 2014

LINKS

N. J. A. Sloane et al., <a href="https://oeis.org/wiki/Binary_Quadratic_Forms_and_OEIS">Binary Quadratic Forms and OEIS</a> (Index to related sequences, programs, references)

#13 by Ray Chandler at Sat Aug 09 11:29:08 EDT 2014

LINKS

Vincenzo Librandi, <a href="/A107158/b107158.txt">Table of n, a(n) for n = 1..1000</a>

Vincenzo Librandi and Ray Chandler, <a href="/A107158/b107158_1.txt">Table of n, a(n) for n = 1..10000</a> [First 1000 terms from Vincenzo Librandi]

STATUS

approved

editing

#12 by N. J. A. Sloane at Tue Aug 05 14:15:33 EDT 2014

MATHEMATICA

QuadPrimesQuadPrimes2[3, 0, 17, 10000] (* see A106856 *)

Discussion

Tue Aug 05

14:15

OEIS Server: https://oeis.org/edit/global/2284

#11 by N. J. A. Sloane at Tue Aug 05 14:12:11 EDT 2014

MATHEMATICA

QuadPrimes[3, 0, 17, 10000] (* see A106856 *) Note: the original QuadPrimes had a bug which could sometimes give wrong answers. This sequence should be checked (unless the coefficient of xy in the quadratic form is zero, in which case QuadPrimes gives correct answers). - N. J. A. Sloane, Jun 04 2014

QuadPrimes[3, 0, 17, 10000] (* see A106856 *)

Discussion

Tue Aug 05

14:12

OEIS Server: https://oeis.org/edit/global/2282

#10 by N. J. A. Sloane at Mon Jun 16 11:28:43 EDT 2014

MATHEMATICA

Discussion

Mon Jun 16

11:28

OEIS Server: https://oeis.org/edit/global/2234

#9 by N. J. A. Sloane at Sun Jun 08 14:54:50 EDT 2014

STATUS

editing

approved