Talk:Untouchable numbers: Difference between revisions
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m (→reduction in the number of (counting) ranges: check if limit*factor with factor = limit^(1/3)) |
(→reduction in the number of (counting) ranges: still not completly correct :-() |
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: is limit for checks == limit^(1/3) |
: is limit for checks == limit^(1/3) |
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: I'll test it with 1e8 and factor 464 will take ~30min |
: I'll test it with 1e8 and factor 464 will take ~30min |
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::Still false at 80000000, but correct for 1e8 ? |
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<pre>LIMIT = 100000000 |
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1229 10007 |
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factor beyond LIMIT 464 |
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runtime for n<= LIMIT 7.972 s |
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Check the rest 46,300,000,000 |
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runtime 1193.714 s |
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10 2 |
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100 5 |
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1000 89 |
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10000 1212 |
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100000 13863 |
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1000000 150232 |
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10000000 1574973 |
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20000000 3184111 |
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30000000 4804331 |
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40000000 6430223 |
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50000000 8060162 |
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60000000 9694467 |
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70000000 11330312 |
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80000000 12967238 |
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90000000 14606549 |
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100000000 16246940 |
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real 19m53,838s</pre> |
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== Number of untouchable numbers up to 1 million == |
== Number of untouchable numbers up to 1 million == |
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