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Binary logarithm: Difference between revisions

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<h2>IMPORTED REVISION FROM WIKISPACES</h2>
The symbols '''log2''', '''lb''' or '''ld''' are used for the '''[http://en.wikipedia.org/wiki/Binary_logarithm binary logarithm]''', also called ''dual logarithm''.
This is an imported revision from Wikispaces. The revision metadata is included below for reference:<br>
: This revision was by author [[User:genewardsmith|genewardsmith]] and made on <tt>2012-03-23 17:21:44 UTC</tt>.<br>
: The original revision id was <tt>314108348</tt>.<br>
: The revision comment was: <tt></tt><br>
The revision contents are below, presented both in the original Wikispaces Wikitext format, and in HTML exactly as Wikispaces rendered it.<br>
<h4>Original Wikitext content:</h4>
<div style="width:100%; max-height:400pt; overflow:auto; background-color:#f8f9fa; border: 1px solid #eaecf0; padding:0em"><pre style="margin:0px;border:none;background:none;word-wrap:break-word;white-space: pre-wrap ! important" class="old-revision-html">The symbols **log2**, **lb** or **ld** are used for the **[[http://en.wikipedia.org/wiki/Binary_logarithm|binary logarithm]]**, also called //dual logarithm//.


==Log2 of the first [[prime numbers|primes]]==  
==Log2 of the first [[prime_numbers|primes]]==
||~ prime ||~ log2 prime ||
 
|| 2 || 1 ||
{| class="wikitable"
|| 3 || 1.584962501 ||
|-
|| 5 || 2.321928095 ||
! | prime
|| 7 || 2.807354922 ||
! | log2 prime
|| 11 || 3.459431619 ||
|-
|| 13 || 3.700439718 ||
| | 2
|| 17 || 4.087462841 ||
| | 1
|| 19 || 4.247927513 ||
|-
|| 23 || 4.523561956 ||
| | 3
|| 29 || 4.857980995 ||
| | 1.584962501
|-
| | 5
| | 2.321928095
|-
| | 7
| | 2.807354922
|-
| | 11
| | 3.459431619
|-
| | 13
| | 3.700439718
|-
| | 17
| | 4.087462841
|-
| | 19
| | 4.247927513
|-
| | 23
| | 4.523561956
|-
| | 29
| | 4.857980995
|}


You can calculate the binary logarithm of n like this
You can calculate the binary logarithm of n like this


log2(n) = ln(n)/ln(2)</pre></div>
log2(n) = ln(n)/ln(2)
<h4>Original HTML content:</h4>
[[Category:howto]]
<div style="width:100%; max-height:400pt; overflow:auto; background-color:#f8f9fa; border: 1px solid #eaecf0; padding:0em"><pre style="margin:0px;border:none;background:none;word-wrap:break-word;width:200%;white-space: pre-wrap ! important" class="old-revision-html">&lt;html&gt;&lt;head&gt;&lt;title&gt;log2&lt;/title&gt;&lt;/head&gt;&lt;body&gt;The symbols &lt;strong&gt;log2&lt;/strong&gt;, &lt;strong&gt;lb&lt;/strong&gt; or &lt;strong&gt;ld&lt;/strong&gt; are used for the &lt;strong&gt;&lt;a class="wiki_link_ext" href="http://en.wikipedia.org/wiki/Binary_logarithm" rel="nofollow"&gt;binary logarithm&lt;/a&gt;&lt;/strong&gt;, also called &lt;em&gt;dual logarithm&lt;/em&gt;.&lt;br /&gt;
[[Category:math]]
&lt;br /&gt;
[[Category:practical_help]]
&lt;!-- ws:start:WikiTextHeadingRule:0:&amp;lt;h2&amp;gt; --&gt;&lt;h2 id="toc0"&gt;&lt;a name="x-Log2 of the first primes"&gt;&lt;/a&gt;&lt;!-- ws:end:WikiTextHeadingRule:0 --&gt;Log2 of the first &lt;a class="wiki_link" href="/prime%20numbers"&gt;primes&lt;/a&gt;&lt;/h2&gt;
[[Category:term]]
 
&lt;table class="wiki_table"&gt;
    &lt;tr&gt;
        &lt;th&gt;prime&lt;br /&gt;
&lt;/th&gt;
        &lt;th&gt;log2 prime&lt;br /&gt;
&lt;/th&gt;
    &lt;/tr&gt;
    &lt;tr&gt;
        &lt;td&gt;2&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;1&lt;br /&gt;
&lt;/td&gt;
    &lt;/tr&gt;
    &lt;tr&gt;
        &lt;td&gt;3&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;1.584962501&lt;br /&gt;
&lt;/td&gt;
    &lt;/tr&gt;
    &lt;tr&gt;
        &lt;td&gt;5&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;2.321928095&lt;br /&gt;
&lt;/td&gt;
    &lt;/tr&gt;
    &lt;tr&gt;
        &lt;td&gt;7&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;2.807354922&lt;br /&gt;
&lt;/td&gt;
    &lt;/tr&gt;
    &lt;tr&gt;
        &lt;td&gt;11&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;3.459431619&lt;br /&gt;
&lt;/td&gt;
    &lt;/tr&gt;
    &lt;tr&gt;
        &lt;td&gt;13&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;3.700439718&lt;br /&gt;
&lt;/td&gt;
    &lt;/tr&gt;
    &lt;tr&gt;
        &lt;td&gt;17&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;4.087462841&lt;br /&gt;
&lt;/td&gt;
    &lt;/tr&gt;
    &lt;tr&gt;
        &lt;td&gt;19&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;4.247927513&lt;br /&gt;
&lt;/td&gt;
    &lt;/tr&gt;
    &lt;tr&gt;
        &lt;td&gt;23&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;4.523561956&lt;br /&gt;
&lt;/td&gt;
    &lt;/tr&gt;
    &lt;tr&gt;
        &lt;td&gt;29&lt;br /&gt;
&lt;/td&gt;
        &lt;td&gt;4.857980995&lt;br /&gt;
&lt;/td&gt;
    &lt;/tr&gt;
&lt;/table&gt;
 
&lt;br /&gt;
You can calculate the binary logarithm of n like this&lt;br /&gt;
&lt;br /&gt;
log2(n) = ln(n)/ln(2)&lt;/body&gt;&lt;/html&gt;</pre></div>
Retrieved from "https://en.xen.wiki/w/Binary_logarithm"