A108060 Numbers n such that 191*n + 193 is prime.

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

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