10000...00001 (29-digits)

This number is a prime.

100000000 0000030000 0000000001

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A very naughty (and perhaps unlucky) palindromic prime of the form 1+3*10^n+100^n containing 13 zeros on each side. [Hammadi]

Submitted: 2020-07-24 18:59:53; Last Modified: 2020-07-24 19:01:49.