4121861
This number is a prime.
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The date when the American Civil War started is 4/12/1861 (4121861 is a Pythagorean prime). Note that it's sum of digits is a Sophie Germain prime! [Anitha]
Submitted: 2023-10-09 15:07:15; Last Modified: 2023-10-09 15:57:22.
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