Truncatable primes: Difference between revisions
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→{{header|Perl 6}}: replace with much faster version |
→{{header|Perl 6}}: remove redundant prime test |
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=={{header|Perl 6}}==
<lang perl6>my @primes := 2, 3, 5, -> $p { ($p+2, $p+4 ... &prime)[*-1] } ... *;
sub prime($i) { (state @)[$i] //= $i %% none @primes ... * >= sqrt $i }
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