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Long chain (Posted on 2015-04-10) Difficulty: 3 of 5
Create a chain of consecutive digits starting with 1 and following 9 by 0: 123456789012345...

How many digits are needed to obtain the 1st prime number?

See The Solution Submitted by Ady TZIDON    
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Hints/Tips re: Computer says... (spoiler) | Comment 5 of 7 |
(In reply to Computer says... (spoiler) by Harry)

This indeed is the correct answer.
  Posted by Ady TZIDON on 2015-04-11 07:14:14

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