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A string of primes (Posted on 2005-09-01) Difficulty: 2 of 5
Starting from an arbitrary prime of 3 digits you choose, construct a sequence of distinct 3-digit primes such that every one is formed by the 2 rightmost digits of the previous one plus any digit juxtaposed to the right - e.g. 113, 137, 373,... What is the maximum number of distinct primes that YOU can achieve in the sequence?

See The Solution Submitted by pcbouhid    
Rating: 2.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re: 1820 computer solutions | Comment 2 of 4 |
(In reply to 1820 computer solutions by Charlie)

Well, only about 1/3 of them fit, but you get the idea.  These are the largest and have 26 primes each.
  Posted by Charlie on 2005-09-01 14:20:30

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