[seqfan] binary table of prime factors of numbers

Jamie Morken jmorken at shaw.ca
Thu Aug 23 11:59:42 CEST 2018


Hi,I saw this on prime number related twitter post today and thought it might be of interest.
https://twitter.com/jhnhw/status/1031829726757900288The Deepmind founder Demis Hassabis "retweeted" that post, and OEIS is mentioned inthe twitter comments as well.
It is a table with n rows and π(n) columns and row values are 1 or 0 depending on if the prime factorgiven by the column is a factor of n for each row.Cosine similarity between the rows and "UMAP dimensionality reduction" is used to create the outputpictures ie this one:https://pbs.twimg.com/media/DlMDjlZXoAAOSQH.jpgTheir python code is here:https://gist.github.com/johnhw/dfc7b8b8519aac530ac97da226c17bd5cheers,Jamie



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