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Incorrect binary representation conversion on large numbers #635

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@Jigglypuffed

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@Jigglypuffed

Hi, I was experimenting with bitwise operations but quickly ran into a problem.
The numbers are implemented as Rust's f64, which causes conversion performed on large numbers to give surprising results.
For example:

X ← °⋯[⍥1 64]
X  # Expected: 18446744073709551615
⋯X # Expected: 64 1s
⧻. # Expected: 64
18446744073709552000
[0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1]
65

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