Terminations and merges of aliquot sequences below 1M

Here is the list of all known aliquot sequences below 1M that reach the height of 120 digits and terminate or merge with another sequence. The list is complete for heights at most 142 digits (coloured in green).

The complete data about terminating and merging aliquot sequences at smaller heights can be found here.

Notation:

SequenceHeightLengthTypeDiscovererDate
857161564250PrimeMr. Odd15 May 2026
215461534266Amicable (1184/1210)yafu@home24 Mar 2024
2938261527039Primeunconnected28 May 2019
3778801503262Merge with 21768yafu@home06 Mar 2021
8258415038Merge with 30420@4007*yafu@home25 Mar 2020
4024441495709Primefivemack18 Dec 2022
290641493217Merge with 3366unknown26 Dec 2019
3979621493081Primeyafu@home25 Dec 2019
4410661484864Merge with 5748yafu@home07 Apr 2025
3992961475182Merge with 316960yafu@home04 Jul 2020
9986081475Merge with 329322@i2647*yafu@home14 Jan 2020
2512081472730PrimeLaurV28 Sep 2017
3183301465554Primeyafu@home18 Jul 2024
8022241453743Perfect (6)Drdmitry04 Jun 2024
9079621453008Merge with 5208Batalov28 Feb 2024
7711741459772Prime unconnected11 Nov 2023
2393581453227Primeyafu@home01 Apr 2020
925761454560Primeyafu@home01 Dec 2018
954481443201Primeyafu@home08 Jun 2020
3188341443350Merge with 47728yafu@home23 Dec 2019
3650221442347Prime unconnected23 Dec 2019
8096641445696Merge with 323784unconnected25 Jul 2018
8885401443797Primeunconnected03 Jul 2018
716041446675Primeunconnected26 May 2017
8001601433236Merge with 22704Drdmitry26 Dec 2024
5879581431396Prime Drdmitry09 Dec 2023
3064081432762Primeyafu@home28 May 2020
6669361436Merge with 154560@i7282*yafu@home09 Mar 2020
8371981424744Primeyafu@home19 Jun 2023
8196001423647Primeyafu@home08 Apr 2020
5345641422122Primeunconnected21 Jun 2018
6011041412695Merge with 147192yafu@home25 Jul 2018
8298361403637Primeyafu@home26 May 2018
816961391662PrimeClifford31 Jul 2018
9622321392326Merge with 35320yafu@home02 May 2018
9555481394189Merge with 773480yafu@home03 Apr 2018
363481394205Primeyafu@home26 Jan 2018
9652081392760Primeyafu@home19 Jan 2018
3299521393617Amicable (1184/1210)unconnected28 Nov 2016
3188281383709Primeunknown03 Jul 2018
2873041383920Primeyafu@home13 Apr 2018
5418721384395Primeyafu@home02 Jan 2018
8928481381624Merge with 1134unconnected20 Dec 2016
5125401384922Primeunconnected01 Nov 2016
4145101378040Merge with 53466yafu@home03 Dec 2018
6705161373433Merge with 1920yafu@home03 Dec 2018
4319281372854Merge with 5208yafu@home27 Sep 2018
6291721373492Primeyafu@home20 Jan 2018
8620021373424Primeyoyo@home12 Aug 2016
3519301363747Merge with 21768yafu@home31 Jan 2018
6853441364539Merge with 69024yoyo@home14 Nov 2016
6257581356294Primeyafu@home04 Aug 2018
7988881353055Merge with 525952fivemack01 Jul 2018
2315521352667Primeyafu@home24 Oct 2017
5375101355726Primeyafu@home19 Sep 2017
4986901353007Primeyafu@home15 Aug 2017
5384641342402Primeyafu@home07 Jun 2017
9510601342170Merge with 398376yafu@home30 Apr 2017
4986661345606Primeyoyo@home24 Oct 2016
7639261333768Primeyoyo@home06 Oct 2016
3750601333195Merge with 660unknown14 Aug 2016
3724021322804Merge with 354620yafu@home16 Jan 2017
7084201323216Primeyafu@home07 Jan 2017
3890881322098Primeunconnected02 Feb 2016
6906421313458Merge with 207228RichD23 Apr 2015
3822481302595Primeyoyo@home30 Jun 2016
7976401297440Merge with 133500yoyo@home29 Sep 2016
1739881296537Merge with 27860yoyo@home11 May 2016
4743761292430Primeyoyo@home12 Mar 2016
7350961295008Primeunconnected24 Feb 2016
2671021291626Primeyoyo@home27 Jul 2015
8041921292829Primeyoyo@home19 Jul 2015
2448721286003Primeyoyo@home01 Jul 2016
4880941282201Merge with 38664yoyo@home16 Jun 2016
4078561282181Primeunconnected30 Nov 2014
6328801272521Merge with 547776yoyo@home03 May 2016
9212321276358Primeunconnected12 Apr 2010
8663881262212Primeyoyo@home03 May 2016
5298661261665PrimeRobertS15 Feb 2016
1103041262701Merge with 45672yoyo@home13 Dec 2015
8167921263946Merge with 36348Greebley?? Dec 2011
7987921252293Perfect (8128)yoyo@home07 Apr 2016
5196781253004Primeyoyo@home23 Jan 2016
7008181253259Primeyoyo@home16 Jun 2015
7062001251919Primeunconnected31 Mar 2015
63828812510Merge with 101844*unconnected02 Mar 2015
6534481254951PrimeBatalov30 Dec 2014
6602121252793PrimeBatalov25 Sep 2014
63655212438Merge with 522032*yoyo@home04 Jan 2016
3876961244697Primeyoyo@home03 Jul 2015
5743441242514Merge with 5748Clifford16 Sep 2012
7070161245932PrimeBatalov12 Nov 2010
9664441232375Primeunconnected26 Feb 2015
2285221234953PrimeSergiosi12 Feb 2014
8567101232983Primeunconnected18 Dec 2013
9934381232522PrimeJatheski20 May 2013
3112021232729Primefirejuggler20 Apr 2013
992401232483PrimeBatalov07 Jul 2012
6719161231616Merge with 660Batalov01 Jul 2011
8600761222276Primeunconnected23 Apr 2015
3361801224115Primeyoyo@home05 Nov 2015
3376621223217Merge with 30352fivemack20 Apr 2015
6752041222568Amicable (2620/2924)RobertS30 Dec 2014
8435281212801Primeunconnected17 Feb 2015
2598961214396Amicable (1184/1210) unconnected25 Oct 2013
7382881213026Primeunconnected17 Mar 2013
7705801214793Primeunconnected05 Feb 2013
628501213973Prime
9453601202330Primeunconnected22 Nov 2014
9274681202951Primef1pokerspee06 Jun 2014
2093761202537Merge with 80880Batalov02 Dec 2013
9923701202911Primeunconnected29 Nov 2013
9338701204239PrimeBatalov10 Dec 2012
194941203417Primefivemack28 Nov 2012

Last update: 27 May 2026