it's not working with large numbers
so the end of test
but i'll search more . i think on the right way
ok i tell details
at first i wrote
5+71=11
5+7+1=13
3+3+1
5+5+1
7+71 7+7+1 X
11+11+1
23+23+1
1+1+1
2+2+1
3+3+1
5+5+1
7+71
11+11+1
13+13+11 X
17+171 +1 X
19+191 +1 X
23+23+1
...
then..
the last digit must not be ....
4,6,8,5,2
then...
13, 113, 11113, 111111113, ...
and i thought it can continue
then count of digit (1) 11111  is even(numbered)
but it's not work ....
;) but intresting to search more in this direction
who can tell next prime number 1.............................11113
(must be even digit of "1")
thanks all
too sorry for mistake
