https://charlesreid1.com/w/index.php?action=history&feed=atom&title=Project_Euler%2F239 2026-06-19T20:00:05Z Revision history for this page on the wiki MediaWiki 1.39.12 https://charlesreid1.com/w/index.php?title=Project_Euler/239&diff=30630&oldid=prev 2026-06-17T21:19:19Z

<p>Create Project Euler/239 - Twenty-two Foolish Primes (via create-page on MediaWiki MCP Server)</p> <p><b>New page</b></p><div>==Problem Statement==<br /> <br /> &#039;&#039;&#039;Twenty-two Foolish Primes&#039;&#039;&#039;<br /> <br /> A set of disks numbered 1 through 100 are placed in a line in random order.<br /> <br /> What is the probability that we have a partial derangement such that exactly 22 prime number discs are found away from their natural positions? (Any number of non-prime disks may also be found in or out of their natural positions.)<br /> <br /> Give your answer rounded to 12 places behind the decimal point in the form 0.abcdefghijkl.<br /> <br /> ==Flags==<br /> <br /> {{ProjectEulerFlag}}</div>

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