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Old 2011-07-26, 16:36   #2
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"Ed Hall"
Dec 2009
Adirondack Mtns

D1216 Posts

Originally Posted by JohnFullspeed View Post
What means 431060 411. sz 115 and what was the associate computetion.
First, you must understand how an aliquot sequence is derived by adding the proper factors of each index and then factoring the new number, if possible. (If not possible, the sequence terminates.*) For example, look at the sequence for 431060 on the factordb site. You can note that the basic number (431060) is the starting point, the 411 is an index (in this case the last one), also referred to as a line or iteration** and the 115 describes the number of digits in the current index composite as opposed to the remaining composite, which in this case, presently, is 111 digits.

* the sequence can also terminate in a cycle
** the index numbering starts at 0
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