factordb · sequences

Sequence

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whole sequence last 20 terms last term range to

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Aliquot of 150^49 length 4 Not fully computed yet - the last known term is composite. ↓ .elf file

Show sequence-development graph

Term size (digits) across the sequence — How the sequence develops - decimal digits of each term vs iteration.

n	Status	Digits	Term	Factorization
0	Fully factored	107	4250810001…00<107>	2⁴⁹×3⁴⁹×5⁹⁸
1	Fully factored	108	1168972750…12<108>	2²×3×2053×6763745012…11<20>×9487638210…09<35>×7394160102…33<48>
2	Fully factored	108	1559958927…48<108>	2²×1699×115861×11651267×33096319073<11>×5137711004…63<81>
3	Composite	108	1171599791…52<108>	2²×2928999478…13<107>
↳	Open Open - the last known term is composite and not yet fully factored.

Open end - submit a factor of the remaining composite (107 digits) of term #3:

29289994786957882220712909088411636013415789848744954639821845803755539412645387785713891683319855873615513

Check for factors - let the server run a small P-1 / P+1 / ECM step on the composite:

Already checked (P-1, P+1 and ECM steps done, level 3).

From the command linefdb · curl

fdb

fdb seq view '150^49' --type 1 --part last20

curl

curl -s 'https://factordb.com:4059/rpc' -H 'Content-Type: application/json' -d '{"jsonrpc":"2.0","id":1,"method":"sequence_view","params":{"start":{"expr":"150^49"},"type":1,"part":"last20","fr":0}}'