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A108341 Numbers n such that 997*n - 1009 is prime. 1
6, 8, 18, 30, 36, 38, 44, 66, 78, 90, 98, 104, 116, 134, 140, 144, 156, 164, 168, 170, 200, 228, 230, 246, 248, 260, 276, 296, 318, 344, 354, 374, 378, 380, 386, 408, 420, 426, 450, 464, 468, 480, 500, 510, 546, 576, 578, 584, 606, 608, 618, 620, 630, 654, 678 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

997 and 1009 are primes.

All terms are even. - Harvey P. Dale, Mar 09 2019

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..1000

EXAMPLE

If n=6, then 997*n - 1009 = 4973 (prime).

If n=90, then 997*n - 1009 = 88721 (prime).

MAPLE

a:=proc(n) if isprime(997*n-1009)=true then n else fi end: seq(a(n), n=1..750); (Deutsch)

MATHEMATICA

Select[Range[2, 700, 2], PrimeQ[997#-1009]&] (* Harvey P. Dale, Mar 09 2019 *)

PROG

(PARI) is(n)=isprime(997*n-1009) \\ Charles R Greathouse IV, Jun 13 2017

CROSSREFS

Sequence in context: A165720 A315945 A086913 * A173975 A199884 A028331

Adjacent sequences:  A108338 A108339 A108340 * A108342 A108343 A108344

KEYWORD

nonn,easy

AUTHOR

Parthasarathy Nambi, Jun 30 2005

EXTENSIONS

More terms from Emeric Deutsch, Jul 04 2005

STATUS

approved

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Last modified July 17 14:44 EDT 2019. Contains 325106 sequences. (Running on oeis4.)