OFFSET
1,1
EXAMPLE
3*5-2=13 is prime;
3*5*7-2=103 is prime;
3*5*7*11-2=1153 is prime;
3*5*7*11*13-2=15013 is prime.
CROSSREFS
KEYWORD
nonn
AUTHOR
Herman H. Rosenfeld (herm3(AT)pacbell.net), Dec 29 2004
EXTENSIONS
Corrected and extended by Emeric Deutsch, Mar 26 2005
STATUS
approved