1489
This number is a prime.
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The year German mathematician Johannes Widmann published
the first printed reference to use the + and - symbols in his
arithmetic book, Mercantile Arithmetic (Behende
und hüpsche Rechenung). [Ely]
Submitted: 2026-08-02 16:51:02; Last Modified: 2026-08-02 16:54:40.
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