12234...43221 (49-digits)
This number is a prime.
122344445 6666667888 8888898888 8888766666 6544443221
Just showing those entries submitted by 'Silva': (Click here to show all)
A prime formed from the nine digits in ascending and descending concatenation, the even digits repeated themselves times. [Silva]
(There are 3 curios for this number that have not yet been approved by an editor.)
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