In fact: 111 = 3 * 37 1111 = 11 * 101 11111 = 41 * 271 111111 = 3 * 7 * 11 * 13 * 37 1111111 = 239 * 4649 11111111 = 11 * 73 * 101 * 137 111111111 = 3 * 3 * 37 * 333667 1111111111 = 11 * 41 * 271 * 9091
so by these examples I'd theorize that NONE of these numbers will be prime. (But I'd be wrong too.) The first prime you find after 11 this way is 19 ones. If you have 10 million ones that would be a multiple of 11 just like any other even number of ones and so it could not be prime. Molly Dixon wrote: > i have figured out that most numbers with all 1s for digits are prime with > this one exception if the number has 3 6 9 12 15 and all other numbers that > have 3 as a factor for the amount if digits in the number. There for 10 > million 1s would be prime. > > > > > > > > ____________________________________________________________________________________ > Looking for last minute shopping deals? > Find them fast with Yahoo! Search. > http://tools.search.yahoo.com/newsearch/category.php?category=shopping > _______________________________________________ > Prime mailing list > [email protected] > http://hogranch.com/mailman/listinfo/prime > > _______________________________________________ Prime mailing list [email protected] http://hogranch.com/mailman/listinfo/prime
