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 How far can you go? (Posted on 2011-03-04)
Starting with a prime digit add another digit, after or before the first, then another, adding it after, before or within the second number, and continue, keeping the resulting numbers prime, without repeating any of the digits you have used so far.

Example: 2, 23, 263, 2063, 29063....

Obviously you cannot reach a pandigital number (it will always be divisible by 9) .

What are the lowest and highest numbers in the set of eligible solutions with the maximum number of digits?

Comments: ( Back to comment list | You must be logged in to post comments.)
 re: Smarandache-Wellin numbers? | Comment 8 of 11 |
(In reply to Smarandache-Wellin numbers? by Benny)

Very interesting!!

I've created a puzzle, found few solutions

and was genuinely surprised to find out

how far can one go.

 Posted by Ady TZIDON on 2011-03-05 17:09:10

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