12233...33221 (25-digits)

This number is a prime.

                                                 12233 3444455555 4444333221

Just showing those entries submitted by 'Silva': (Click here to show all)

+ A palindromic prime formed from the first five digits, where each digit d is repeated d times in ascending and descending order. [Silva]

Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell