11211...11111 (66-digits)

This number is a prime.

    112113 1114111151 1111611111 1711111118 1111111191 1111111110 1111111111

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Prime formed by concatenating the first ten integers in order and placing i ones after each integer i. [Silva]

Submitted: 2019-09-13 17:15:08;   Last Modified: 2019-09-13 18:29:44.
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