this post was submitted on 11 Dec 2024
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It looks so wrong (sh.itjust.works)
submitted 3 months ago by [email protected] to c/[email protected]
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[–] [email protected] 15 points 3 months ago* (last edited 2 months ago) (1 children)

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.

[–] [email protected] 2 points 3 months ago (1 children)

Also

Ends in 0,

but that's covered by 5 really.

[–] [email protected] 7 points 2 months ago

It's also covered by being even.