OFFSET
1,2
COMMENTS
if p is prime and nextprime(p*n)<nextprime(p)*nextprime(n) then n is composite
EXAMPLE
nextprime(2*6)=13 and nextprime(2)*nextprime(6)=2*7=14 then 6 is member because 13<14
PROG
(PARI) for(i=1, 150, if(nextprime(2*i)<nextprime(2)*nextprime(i), print1(i, ", ")))
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Mohammed Bouayoun (mohammed.bouayoun(AT)sanef.com), Apr 18 2006
STATUS
approved