70000...00007 (99-digits)

This number is a prime.

700000000 0000000000 0000000000
0000000000 0000000000 8000000000 0000000000 0000000000 0000000000 0000000007

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The largest palindromic prime less than a googol with exactly three nonzero digits. [Loungrides]

Submitted: 2018-12-31 17:03:20; Last Modified: 2018-12-31 17:40:27.