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Big, super and prime (Posted on 2010-10-20) Difficulty: 4 of 5
A superprime is an integer such that all its left-to-right initial segments are prime (e.g. 7331 whose segments are 7, 73, 733, and 7331, all prime).
There is a largest superprime.

Find it.

Source: USA Computing Olympiad, Feb 1995.

No Solution Yet Submitted by Ady TZIDON    
Rating: 3.0000 (2 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re: Another method. | Comment 3 of 8 |
(In reply to Another method. by broll)

this is also similar to project euler problem 37 in which primes that are both left and right truncatable are sought.
http://projecteuler.net/index.php?section=problems&id=37
The code I used for this problem was simply the code from the first part of my solution to the project euler problem.


  Posted by Daniel on 2010-10-20 12:50:37
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