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<p>[QUOTE=&quot;messydesk, post: 3023519, member: 1765&quot;]A while ago, someone asked me if I was going to do a &quot;digits of pi&quot; set after finishing my Prime Number Set.&nbsp; One could no doubt make a pretty cool set of 16th-20th century coins whose dates appear in the first however-many digits of pi.&nbsp; The first 500 decimal places will get you 26 coins from 1520 through 1971 (assuming I didn&#039;t miss any).&nbsp; Only three, 1609, 1861 and 1949 are also prime.&nbsp; Two dates, 1715 and 1536, overlap, sharing the 15.&nbsp; There are some good coin years in there for US collectors, including 1652 and 1793.</p><p><br /></p><p>As to whether I&#039;m going to do it, of course I will.&nbsp; I&#039;ll probably go register a showcase set today from what I already have in my PCGS inventory.[/QUOTE]</p><p><br /></p>

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