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It looks so wrong (sh.itjust.works)
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[-] sugar_in_your_tea@sh.itjust.works 15 points 3 days ago* (last edited 2 days ago)

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.

Also

Ends in 0,

but that's covered by 5 really.

It's also covered by being even.

this post was submitted on 11 Dec 2024
596 points (95.4% liked)

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