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A028372
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Smallest prime that is simultaneously of forms x^2 + m*y^2 for m = 1, ..., n.
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4
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2, 2, 73, 73, 241, 241, 1009, 1009, 1009, 1009, 7561, 7561, 21961, 35281, 35281, 35281, 44641, 44641, 374089, 622561, 622561, 622561, 4379281, 4379281, 4379281, 17690689, 17690689, 17690689, 17690689, 17690689, 316234801, 1996405009, 1996405009, 1996405009
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OFFSET
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1,1
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COMMENTS
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Sequence A155715 lists the smallest numbers of this kind with x,y > 0, but not necessarily prime. - M. F. Hasler, Jan 27 2009
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LINKS
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PROG
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(PARI) p=2; for(k=1, 999, forstep( c=k, 1, -1, for( b=1, sqrtint(p\c), issquare(p-c*b^2) & next(2)); p=nextprime(p+1); c=k+1); print1(p", ")) \\ M. F. Hasler, Jan 27 2009
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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