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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?

 Subject Author Date re(2): Smarandache-Wellin numbers? Ady TZIDON 2011-03-06 10:26:57 re: Smarandache-Wellin numbers? Charlie 2011-03-05 21:29:12 re: Smarandache-Wellin numbers? brianjn 2011-03-05 19:54:28 re: Smarandache-Wellin numbers? Ady TZIDON 2011-03-05 17:09:10 Smarandache-Wellin numbers? BenVitale 2011-03-05 16:08:00 re: Prime Calculator Help brianjn 2011-03-04 21:41:20 solution Charlie 2011-03-04 21:00:19 Prime Calculator Help brianjn 2011-03-04 19:56:50 re: and with 3 Charlie 2011-03-04 16:32:54 and with 3 xdog 2011-03-04 15:57:06 Solution starting with 2 xdog 2011-03-04 14:13:30

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