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Old 2003-12-06, 13:39   #9
Evgeny Dolgov
 

2·3·757 Posts
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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+7-1=11
5+7+1=13
3+3+1
5+5+1
7+7-1 7+7+1 X
11+11+1
23+23+1

1+1+1
2+2+1
3+3+1
5+5+1
7+7-1
11+11+1
13+13+1-1 X
17+17-1 +1 X
19+19-1 +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
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