OFFSET
1,2
MATHEMATICA
NextPrim[n_] := Block[{k = n + 1}, While[ !PrimeQ[k], k++ ]; k]; p = 1; Do[ If[ Mod[p = NextPrim[p], n] == n - 7, Print[n]], {n, 1, 10^9}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Robert G. Wilson v, Feb 18 2004
EXTENSIONS
Corrected by Mohammed Bouayoun (bouyao(AT)wanadoo.fr), Feb 20 2004
STATUS
approved