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Never prime! (2) (Posted on 2010-09-04) Difficulty: 2 of 5
The value of the smallest positive base ten integer that cannot be changed into a prime by changing a single digit was determined in Never prime!.

Determine the respective minimum values of a positive base N integer P that cannot be changed into a prime by changing a single digit, whenever N is a positive integer with 3 ≤ N ≤ 16, but N ≠ 10.

Note: P cannot contain any leading zero, and the first digit of P (reading left to right) cannot be changed to a zero.

No Solution Yet Submitted by K Sengupta    
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re: solution | Comment 3 of 4 |
(In reply to solution by Justin)

Base 4; P = 24; 60

... but base 4 doesn't have a digit 6.


  Posted by Charlie on 2010-09-05 12:14:55
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