20122...99999 (48-digits)

This number is a prime.

20122333 4444555556 6666677777 7788888888 9999999999

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The only prime formed by inserting between the digits of a double-digit number n, (n=29), the zero followed in order by all the rep-digit numbers using d times each digit d. [Loungrides]

Submitted: 2020-04-25 14:50:17; Last Modified: 2020-04-25 21:40:25.