That of course means that 2021 is a semiprime (a product of two prime numbers).
The previous semiprime year was 2019 = 3 x 673.
Five years later it will be the next semiprime year, 2026 = 2 x 1013.
I should clarify: I didn’t do that. It would have been a bad idea anyway.
A Mathematical Coloring Book
Article by Hampton, Marshall
In collections: Art, Easily explained, Things to make and do
Didn’t know this had been. Looks interesting!!
I made a guest post at the n-Category Café, thanks to a kind invitation by John Baez! The plan is for it to be the first of a series:
Interested in statistics, algorithms, patterns, and randomness. My other, main account is where I hangout with my townsfolk. This one's for science-chat. #nobot
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