The only 2-didgit palindromic prime is 11.
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1. 1991 is the only number I think.
What is the greatest palindromic number less than 999?
1001 is the smallest 4 digit palindromic number.
The only number that fits those conditions is... 55
A number is said to be palindromic when it remains the same when it is reversed. 5 reversed is 5 itself.