OFFSET
0,15
EXAMPLE
10006181886601 is the least of the quartet of bemirps:
10006181886601, 10009181889901, 10668818160001, 10998818190001 are all primes;
10006181886599, 10009181889899, 10668818159999, 10998818189999 are all primes;
4 pairs of twins.
CROSSREFS
KEYWORD
base,nonn,uned
AUTHOR
Pierre CAMI, Oct 27 2006
STATUS
approved