10000...00019 (64-digits)

This number is a composite.

1000 0000000000 0000000000 0000000000 0000000000 0000000000 0000000019

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10⁶³ + 19 is a 64-digit semiprime with 64/2-digit factors. How fast can your computer find them?

Submitted: 2003-07-20 20:27:49; Last Modified: 2008-01-30 17:28:00.