5273
This number is a prime.
Just showing those entries submitted by 'Loungrides': (Click here to show all)
The only distinct-digit prime-digit prime that, repeating
each of its digits d, (d+1) times, creates another
prime-digit prime, i.e., 555555222777777773333. [Loungrides]
(There is one curio for this number that has not yet been approved by an editor.)
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