The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A141171 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A141171

Primes of the form -x^2+4*x*y+2*y^2 (as well as of the form 5*x^2+8*x*y+2*y^2).
(history; published version)

#39 by Bruno Berselli at Fri Oct 28 08:56:40 EDT 2016

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proposed

approved

#38 by Jean-François Alcover at Fri Oct 28 08:55:21 EDT 2016

STATUS

editing

proposed

#37 by Jean-François Alcover at Fri Oct 28 08:54:43 EDT 2016

COMMENTS

Conjecture: this This is also the list of primes p such that p = 2 or p is congruent to 2, 5 or 23 mod 24 - Jean-François Alcover, Oct 27 28 2016

MATHEMATICA

Select[Prime[Range[250]], # == 2 || MatchQ[Mod[#, 24], 5|23]&] (* Jean-François Alcover, Oct 28 2016 *)

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approved

editing

#36 by Bruno Berselli at Thu Oct 27 08:10:58 EDT 2016

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proposed

approved

#35 by Jean-François Alcover at Thu Oct 27 06:50:20 EDT 2016

STATUS

editing

proposed

#34 by Jean-François Alcover at Thu Oct 27 06:50:09 EDT 2016

COMMENTS

Conjecture: this is also the list of primes congruent to 2, 5 or 23 mod 24 - Jean-François Alcover, Oct 27 2016

STATUS

approved

editing

#33 by N. J. A. Sloane at Sat Oct 18 14:07:46 EDT 2014

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editing

approved

#32 by N. J. A. Sloane at Sat Oct 18 14:07:44 EDT 2014

CROSSREFS

Cf. A141170 (d = 24), A105880 (Primes for which -8 is a primitive root.) A038872 (d = 5). A038873 (d = 8). A141122, A068228, A141123 (d = 12). A038883 (d = 13). A038889 (d = 17). A141111, A141112 (d = 65).

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approved

editing

#31 by Peter Luschny at Wed Oct 01 16:48:43 EDT 2014

STATUS

editing

approved

#30 by Peter Luschny at Wed Oct 01 16:44:31 EDT 2014

REFERENCES

D. B. Zagier, Zetafunktionen und quadratische KoerperKörper.

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reviewed

editing