OFFSET
1,1
COMMENTS
EXAMPLE
6945715839196407=3*7*7*13*13*19*31*37*43*61*67*73
7516596593102961=3*7*7*13*13*19*31*37*43*61*67*79
CROSSREFS
KEYWORD
nonn
AUTHOR
Pierre CAMI, Jan 13 2008
STATUS
approved