Is there any proof that the sum of factorial numbers is divisible by 3? – math.stackexchange.com

Is there any proof that the sum of factorial numbers is divisible by 3? – math.stackexchange.com

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I wish to know if someone have already proof that: $$\sum_{n=1}^m n! \equiv 0\pmod 3$$ with $m\gt1$ Ps: Sorry for possible mistakes(english is not my mother language).

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