GPV67
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User ID6458
Collatz Conjecture member since16 Jan 2010
CountryFrance
URLhttp://www.planetary.org/about/our-founders/carl-sagan.html
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Best Result2302 steps for 2371200428260802291711 on 2011-08-30 16:43:05
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Byron Leigh Hatch @ team Carl Sagan
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