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A108028 Numbers k such that 139*k + 137 is prime. 3

%I #19 Apr 03 2023 10:36:10

%S 0,6,8,14,20,38,54,66,78,80,84,90,98,104,108,110,128,138,140,146,156,

%T 170,194,204,206,210,216,236,258,260,264,276,288,296,314,320,338,350,

%U 360,380,386,390,426,428,440,446,450,456,458,464,476

%N Numbers k such that 139*k + 137 is prime.

%C 137 and 139 are twin primes.

%H Daniel Starodubtsev, <a href="/A108028/b108028.txt">Table of n, a(n) for n = 1..10000</a>

%H Chris Caldwell, <a href="https://t5k.org/lists/small/1ktwins.txt">The First 1,008 Twin Primes</a>.

%e If k=84 then 139*k+ 137 = 11813 (prime).

%t Select[Range[0, 500], PrimeQ[139*# + 137] &] (* _Stefan Steinerberger_, Mar 03 2006 *)

%o (PARI) is(n)=isprime(139*n+137) \\ _Charles R Greathouse IV_, Jun 06 2017

%K nonn,easy

%O 1,2

%A _Parthasarathy Nambi_, May 31 2005

%E More terms from _Stefan Steinerberger_, Mar 03 2006

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Last modified April 23 18:16 EDT 2024. Contains 371916 sequences. (Running on oeis4.)