|
%I #15 Sep 08 2022 08:45:18
%S 14,24,30,48,74,78,86,108,116,128,146,168,176,188,200,204,216,234,240,
%T 248,266,294,300,308,314,318,330,350,380,386,396,410,420,468,470,480,
%U 494,510,524,534,536,554,576,584,590,596,620,630,636,648,650,666,680
%N Numbers k such that 1009*k - 9973 is prime.
%C 1009 and 9973 are the smallest and largest of four-digit primes.
%e If k=14, then 1009*k - 9973 = 4153 (prime).
%e If k=128, then 1009*k - 9973 = 119179 (prime).
%o (Magma) [n: n in [10..100000] | IsPrime(1009*n - 9973)]; // _Vincenzo Librandi_, Nov 13 2010
%o (PARI) is(n)=isprime(1009*n-9973) \\ _Charles R Greathouse IV_, Jun 13 2017
%Y Cf. A105680, A105710.
%K nonn,easy
%O 1,1
%A _Parthasarathy Nambi_, May 13 2005
|
