98688188689
This number is a prime.
9 8688188689
Single Curio View: (Seek other curios for this number)
Smallest non-insertable palindromic prime (no matter where you
append or prepend or insert a digit you get a composite
number). [Vantieghem]
Submitted: 2025-12-17 15:55:43; Last Modified: 2025-12-17 16:51:22.
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