A092046 Numbers n such that prime(n) == -4 (mod n).

1, 3, 5, 7, 9, 67, 441, 2615, 637237, 637329, 4124703, 27067119, 179993017, 1208198617, 8179002101, 55762149071, 55762149091

Offset

1,2

Links

Table of n, a(n) for n=1..17.

Mathematica

NextPrim[n_] := Block[{k = n + 1}, While[ !PrimeQ[k], k++ ]; k]; p = 1; Do[ If[ Mod[p = NextPrim[p], n] == n - 4, Print[n]], {n, 1, 10^9}]

Crossrefs

Cf. A023146, A045924, A092044, A092045, A092047, A092048, A092049, A092050, A092051, A092052.

Sequence in context: A117996 A234524 A260681 * A228328 A085951 A132286

Adjacent sequences: A092043 A092044 A092045 * A092047 A092048 A092049

Keyword

nonn

Author

Robert G. Wilson v, Feb 18 2004

Extensions

Corrected by Mohammed Bouayoun (bouyao(AT)wanadoo.fr), Feb 20 2004

a(13)-a(17) from Robert G. Wilson v, Feb 22 2006

Status

approved