Challenge #187: Generate Prime Numbers

[Samanthaj_hughes]

I really enjoyed thinking this one through. Simple but thought provoking.

[Steph_Maddrell]

Spoiler

[cwkoops]

Found all 15.  

[JackBurnham]

b

[duartepimentel]

Solution attached

[Elias_Nordlinder]

Here is my solution 🙂

Spoiler

[EW]

What a fun challenge!  I really enjoyed this one.  Looking at other answers, I was surprised to see that nearly all use a certain tool (in my spoilers).  For some reason I was expecting more variety in strategies for this, even though nothing really comes to mind.  

Spoiler

I'm wondering if there are good solutions to this outside of generate rows or macros!

[BSilverblatt]

Thanks for the challenge! Here is my solution:

[Watermark]

Spoiler

 

[LiuZhang]

Spoiler