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Numbers n such that 90*n + 77 and 90*n + 79 are twin primes.
1

%I #17 Mar 19 2023 10:35:20

%S 3,6,15,17,18,19,20,24,29,41,45,46,60,62,68,75,82,83,89,94,95,104,111,

%T 115,122,130,146,148,152,159,169,173,174,179,199,215,218,223,227,236,

%U 239,244,255,267,276,288,305,334,353,355,356,358,369,375,381,393,398

%N Numbers n such that 90*n + 77 and 90*n + 79 are twin primes.

%H Harvey P. Dale, <a href="/A224864/b224864.txt">Table of n, a(n) for n = 1..1000</a>

%F A201822 INTERSECTS A202112.

%t Select[Range[0, 499], PrimeQ[90# + 77] && PrimeQ[90# + 79] &] (* copied from: _Alonso del Arte_, Jul 22 2013 *)

%t Select[Range[500],AllTrue[90#+{77,79},PrimeQ]&] (* _Harvey P. Dale_, Mar 19 2023 *)

%Y Cf. A201822, A202112.

%K nonn

%O 1,1

%A _J. W. Helkenberg_, Jul 22 2013