perplexus.info :: Numbers : only one

Home > Numbers

only one (Posted on 2010-12-28)

There is only one palindromic prime with an even number of digits.

Prove it.

See The Solution Submitted by Ady TZIDON

Rating: 4.5000 (2 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)

Answer

Comment 3 of 3 |

Every palindrome with an even number of digits is divisible by 11, so the only palindromic prime with an even number of digits is 11.

Posted by Math Man on 2011-01-01 11:32:24

Please log in:

Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (19)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:


perplexus dot info