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It looks so wrong(sh.itjust.works)

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Sjmarf@sh.itjust.works
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whitepeopletwitter@sh.itjust.works
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sugar_in_your_tea@sh.itjust.works
15 points
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Yup, my personal prime check is:

  1. Even?
  2. Ends in 5?
  3. Digits sum to 3?

If it fails all three and it’s not an “obvious” prime (<20), then it’s prime enough for me.

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Knock_Knock_Lemmy_In@lemmy.world
2 points

Also

Ends in 0,

but that’s covered by 5 really.

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sugar_in_your_tea@sh.itjust.works
6 points

It’s also covered by being even.

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