Giuga numbers: Difference between revisions

m
(julia example)
m (→‎{{header|Julia}}: less alloc)
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<lang ruby>using Primes
 
isGiuga(n) = all(f =-> factor(Vector, n); first(f) != n && all(f -> rem(n ÷ f - 1, f) == 0, ffactor(Vector, n))
 
function getGiuga(N)
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</pre>
 
 
=={{header|Perl}}==
4,107

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