OFFSET
1,1
COMMENTS
EXAMPLE
2191 is an interprime and 2191/7 = 317 is prime.
MATHEMATICA
s=7; Select[Table[(Prime[n+1]+Prime[n])/2, {n, 2, 1000}], PrimeQ[ #/s]&]
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Zak Seidov, Sep 12 2002
STATUS
approved