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18
votes
6answers
775 views
efficient way to count the number of zeros at the (right) end of a very large number
If I want to count the number of zeros at the (right) end of a large number, like $12345!$, I can use something like:
Length[Last[Split[IntegerDigits[12345!]]]]
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16
votes
4answers
385 views
Getting lengths of sublists that sum to more than one
I have a long list of numbers, and I'm interested in finding the length of each sublist that totals to more than 1, so for the list
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