10000...00003 (102-digits)

This number is a prime.

                                         10 0000000000 0000000000 0000000000
0000000000 0000000000 0000000000 0000000000 0000000000 0000000000 0000000003

+ The only prime formed by inserting a hundred zeros between the digits of a double-digit number. [Loungrides]

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