Penny has announced the winners of the witch contest and my two favourites weren't amongst them... so now I'll never know who did them... unless someone tells me....
my absolute favourite was the dark 68 and my favourite cute one was the tortoise 138.
Anyone know???
Update: the tortoise is by happy d
BrainTwister #57: Prime jumps
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From New Scientist #3527, 25th January 2025 [link] [link] If we start with
21 (which isn’t a prime number), how many times do we have to add 100
before we ...
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