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Though this be madness, yet there is method in it... (Posted on 2012-09-20) Difficulty: 2 of 5
From a posting to the Math Fun mailing list by R. W. Gosper, Dec 03 2009:

(Begin)
Gosper: I just reordered checks.
Bank Lady: Where would you like the numbering to start?
Gosper: What was my last one?
Bank Lady: 1093
Gosper: Well then obviously 3511 .
Bank Lady: [Opens mouth. Decides not to ask. Resumes typing.]
(End)


My question : How many checks can you order for Mr. Gosper's checkbook, using his numbering system?

See The Solution Submitted by Ady TZIDON    
Rating: 4.3333 (3 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Solution Solution Comment 6 of 6 |
Only 2 because there are 2 known Wieferich primes.


  Posted by Math Man on 2013-04-14 20:40:53
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