David Meyer on Nostr: A factorion is an interesting kind of natural number that equals the sum of the ...

A factorion is an interesting kind of natural number that equals the sum of the factorials of its decimal digits [1,3].

40585 is the largest known factorion and was discovered in 1964 by Leigh Janes [2].

#factorion #math #maths #numbertheory

References
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[1] "Factorion", https://en.wikipedia.org/wiki/Factorion

[2] "Mathematician:Leigh Janes", https://proofwiki.org/wiki/Mathematician:Leigh_Janes

[3] "Factorion", https://mathworld.wolfram.com/Factorion.html