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Old 2020-10-26, 13:54   #4
sweety439
 
Nov 2016

282010 Posts
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The number 1578 merges to 56440, but it is not known whether the sequence of 56440 (currently at 166 digits) also merges to 56440, thus it is not known whether 56440 is member of sociable number cycle (but if so, then this cycle will contain 6000+ numbers ....)
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