Perfect numbers: Difference between revisions
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(Pari/GP) |
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{Show {Filter {List.number 1 10000 1} IsPerfect}} |
{Show {Filter {List.number 1 10000 1} IsPerfect}} |
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{Show {IsPerfect 33550336}}</lang> |
{Show {IsPerfect 33550336}}</lang> |
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=={{header|PARI/GP}}== |
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Uses built-in method. Faster tests would use the LL test for evens and myriad results on OPNs otherwise. |
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<lang>isPerfect(n)=sigma(n,-1)==2</lang> |
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=={{header|Perl}}== |
=={{header|Perl}}== |
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