

A108060


Numbers n such that 191*n + 193 is prime.


0



0, 8, 18, 20, 30, 36, 38, 44, 50, 56, 66, 74, 78, 80, 86, 90, 98, 116, 144, 150, 156, 164, 174, 176, 198, 200, 204, 230, 234, 260, 284, 288, 300, 308, 314, 326, 350, 354, 366, 368, 408, 426, 450, 458, 464, 470, 480, 494, 498, 504, 518, 540, 546, 570, 588, 594
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OFFSET

1,2


COMMENTS

191 and 193 are twin primes.


LINKS

Table of n, a(n) for n=1..56.
Chris Caldwell, The First 1,008 Twin Primes.


EXAMPLE

If n=56, then 191*n + 193 = 10889 (prime).


MATHEMATICA

Select[Range[0, 1000], PrimeQ[191#+193]&] (* Harvey P. Dale, Dec 26 2010 *)


PROG

(Magma) [n: n in [0..100000]  IsPrime(191*n + 193)] // Vincenzo Librandi, Nov 13 2010
(PARI) is(n)=isprime(191*n+193) \\ Charles R Greathouse IV, Jun 13 2017


CROSSREFS

Sequence in context: A307973 A031258 A277557 * A279688 A178180 A269311
Adjacent sequences: A108057 A108058 A108059 * A108061 A108062 A108063


KEYWORD

nonn,easy


AUTHOR

Parthasarathy Nambi, Jun 02 2005


STATUS

approved



