22333...99989 (44-digits)

This number is a prime.

                            2233 3444455555 6666667777 7778888889 8999999989

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

22333444455555666666777777788888898999999989 is the smallest prime number such that the digit d is present in it d-times, for d=2 to 9. [Rivera]