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The A858 puzzle - Negative PID
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<p class="card-text line-clamp-3">The A858DE45F56D9BC9 (often shortened to A858) puzzle is an unresolved Internet mystery that has been captivating cryptography experts for years. It’s a</p>
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<p class="d-inline-block text-truncate mb-0">Negative PID <span class="text-secondary">(negativepid.blog)</span></p>
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</div></p><p><a href="https://mastodon.social/tags/cryptography" rel="tag">#<span>cryptography</span></a> <a href="https://mastodon.social/tags/internetMysteries" rel="tag">#<span>internetMysteries</span></a> <a href="https://mastodon.social/tags/unsolvedCases" rel="tag">#<span>unsolvedCases</span></a> <a href="https://mastodon.social/tags/coldCases" rel="tag">#<span>coldCases</span></a> <a href="https://mastodon.social/tags/internetPuxxles" rel="tag">#<span>internetPuxxles</span></a> <a href="https://mastodon.social/tags/a858puzzle" rel="tag">#<span>a858puzzle</span></a> <a href="https://mastodon.social/tags/digitalInvestigations" rel="tag">#<span>digitalInvestigations</span></a> <a href="https://mastodon.social/tags/OSINT" rel="tag">#<span>OSINT</span></a>  <a href="https://mastodon.social/tags/socialEngineering" rel="tag">#<span>socialEngineering</span></a> <a href="https://mastodon.social/tags/cyberInvestigations" rel="tag">#<span>cyberInvestigations</span></a> <a href="https://mastodon.social/tags/intelligence" rel="tag">#<span>intelligence</span></a> <a href="https://mastodon.social/tags/darkWeb" rel="tag">#<span>darkWeb</span></a> <a href="https://mastodon.social/tags/negativepid" rel="tag">#<span>negativepid</span></a></p>]]></description><link>https://board.circlewithadot.net/topic/d231b749-f94d-490e-b53b-5c792a430e6d/the-a858-puzzle</link><generator>RSS for Node</generator><lastBuildDate>Fri, 17 Apr 2026 00:05:35 GMT</lastBuildDate><atom:link href="https://board.circlewithadot.net/topic/d231b749-f94d-490e-b53b-5c792a430e6d.rss" rel="self" type="application/rss+xml"/><pubDate>Wed, 08 Apr 2026 00:48:05 GMT</pubDate><ttl>60</ttl></channel></rss>