factordb · sequences

Sequence

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whole sequence last 20 terms last term range to

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Aliquot of 188^81 length 3 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	185	1609851402…88<185>	2¹⁶²×47⁸¹
1	Fully factored	185	1679844942…48<185>	2⁴×19×163×863×85782251×3449880216…63<19>×3717176509…59<51>×3570940171…69<100>
2	Composite	185	1771167280…52<185>	2⁴×59×751×5729567×1370040292…69<17>×3182676572…21<156>
↳	Open Open - the last known term is composite and not yet fully factored.

Open end - submit a factor of the remaining composite (156 digits) of term #2:

318267657241321681982613952880467678114382863040000346441450549595766665082126382343317452336601976531080219793421200467224119598529008218891531200639166421

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 '188^81' --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":"188^81"},"type":1,"part":"last20","fr":0}}'