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 2017-05-08, 10:49 #6 garambois     Oct 2011 367 Posts I reserve all the aliquot sequences that start on the integer powers of 2, 3 and 5. Why ? At the moment, I am calculating the aliquot sequences that start on the integers n = 2 ^ i. I am at i = 432. But it begins to be long. All those aliquot sequences end with 1 for now. I also calculate the sequences for the n = 3 ^ i (I am at i = 66) and n = 5 ^ i (I am at i = 62). For the odd values of i, those sequences end at 1, but for the even values of i, I usually fall on OE sequences. Then, I then stop at 120 digits. I reserve therefore all the aliquot sequences that start on the integer powers of 2, 3 and 5. Later, I will try to calculate the aliquot sequences that start on the integer powers of 6, 7 and 10 (integer powers of 8 and 9 are included in integer powers of 2 and 3). But if someone wants to try before me and put the results on factordb... If someone does this work, please tell me here, so I can use the results.