A108342 Numbers n such that 1009*n - 997 is prime.

2, 20, 26, 36, 42, 44, 62, 102, 116, 140, 144, 146, 174, 180, 182, 194, 216, 282, 284, 300, 314, 330, 336, 372, 386, 440, 450, 462, 476, 480, 494, 506, 510, 512, 516, 572, 576, 590, 596, 606, 636, 642, 650, 680, 702, 722, 732, 746, 756, 770, 776, 782, 792

Offset

1,1

Comments

997 and 1009 are primes.

Links

Harvey P. Dale, Table of n, a(n) for n = 1..10000

Example

If n=2 then 1009*n - 997 = 1021 (prime).
If n=140 then 1009*n - 997 = 140263 (prime).

Mathematica

Select[Range[1000], PrimeQ[1009#-997]&] (* Harvey P. Dale, Jul 29 2014 *)

Prog

(Magma) [n: n in [1..100000] | IsPrime(1009*n - 997)] - Vincenzo Librandi, Nov 13 2010
(PARI) is(n)=isprime(1009*n-997) \\ Charles R Greathouse IV, Jun 12 2017

Crossrefs

Sequence in context: A145681 A108061 A154546 * A136903 A078460 A059208

Adjacent sequences: A108339 A108340 A108341 * A108343 A108344 A108345

Keyword

nonn,easy

Author

Parthasarathy Nambi, Jun 30 2005

Status

approved