Perfect numbers: Difference between revisions
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[n|n<-[1..10^4],sigma(n,-1)==2] |
[n|n<-[1..10^4],sigma(n,-1)==2] |
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</syntaxhighlight> |
</syntaxhighlight> |
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{{Out}} |
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<pre> |
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[6, 28, 496, 8128] |
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</pre> |
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===Faster with Lucas-Lehmer test=== |
===Faster with Lucas-Lehmer test=== |
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