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<p>[QUOTE=&quot;kaparthy, post: 3292109, member: 57463&quot;]Your Prime Number registry set was an unexpected and pleasant surprise.&nbsp; Thanks. I read the topic posts here in CoinTalk and followed the link to your PCGS page.&nbsp; I also printed it as a PDF and archived it.&nbsp; I have a special interest in prime numbers.</p><p>(<i>The Code Book</i> on my blog here: <a href="https://necessaryfacts.blogspot.com/2013/12/the-code-book.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://necessaryfacts.blogspot.com/2013/12/the-code-book.html" rel="nofollow">https://necessaryfacts.blogspot.com/2013/12/the-code-book.html</a>) Primes are important to the creation of public key (asymmetric) cryptosystems. Basically, you start with two large primes, multiply them, and get a key number. Factoring that number back down to its primes is computationally difficult. We use this to secure bank transactions and to connect two cellphones for a call and to protect the passwords of BBS users among a lot of other stuff.&nbsp; </p><p><br /></p><p>Anyway, good luck with your set, and thanks, again.[/QUOTE]</p><p><br /></p>

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