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How far can you go? (Posted on 2011-03-04) Difficulty: 5 of 5
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?

Please specify the interim stages leading to your results.

No Solution Yet Submitted by Ady TZIDON    
Rating: 4.0000 (3 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
Some Thoughtsre(2): Smarandache-Wellin numbers?Ady TZIDON2011-03-06 10:26:57
re: Smarandache-Wellin numbers?Charlie2011-03-05 21:29:12
re: Smarandache-Wellin numbers?brianjn2011-03-05 19:54:28
re: Smarandache-Wellin numbers?Ady TZIDON2011-03-05 17:09:10
Smarandache-Wellin numbers?BenVitale2011-03-05 16:08:00
re: Prime Calculator Helpbrianjn2011-03-04 21:41:20
SolutionsolutionCharlie2011-03-04 21:00:19
Prime Calculator Helpbrianjn2011-03-04 19:56:50
re: and with 3Charlie2011-03-04 16:32:54
and with 3xdog2011-03-04 15:57:06
Solution starting with 2xdog2011-03-04 14:13:30
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