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A101086 Numbers k for which 997*k + 1009 is prime. 7

%I #21 Feb 03 2024 00:49:40

%S 0,6,10,12,22,36,64,76,82,94,126,130,136,144,150,162,174,186,202,204,

%T 246,250,252,274,276,292,294,300,306,312,330,342,360,364,390,430,466,

%U 472,480,484,490,502,526,540,546,582,586,592,594,606,610,616,622,642

%N Numbers k for which 997*k + 1009 is prime.

%C 997 is the largest three-digit prime and 1009 is the smallest four-digit prime.

%e If k=6, then 997*6 + 1009 = 6991 (prime).

%e If k=10, then 997*10 + 1009 = 10979 (prime).

%e If k=12, then 997*12 + 1009 = 12973 (prime).

%t Select[Range[0,700],PrimeQ[997#+1009]&] (* _Harvey P. Dale_, Jun 29 2011 *)

%o (Magma) [ n: n in [0..700] | IsPrime(997*n + 1009) ]; // _Vincenzo Librandi_, Feb 04 2011

%Y Cf. A100776, A101084, A101123, A101444.

%K nonn

%O 1,2

%A _Parthasarathy Nambi_, Jan 21 2005

%E Extended by _Ray Chandler_, Jan 25 2005

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Last modified April 19 08:06 EDT 2024. Contains 371782 sequences. (Running on oeis4.)