factordb · sequences

Sequence

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whole sequence last 20 terms last term range to

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Conway climb · Base 33 of 16 length 12 Not fully computed yet - the last known term is composite. ↓ .elf file

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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	2	16	2⁴
1	Fully factored	2	70	2×5×7
2	Fully factored	4	2350	2×5²×47
3	Fully factored	7	2553752	2³×19×53×317
4	Fully factored	10	2722932650<10>	2×5²×54458653
5	Fully factored	13	3028546845…58<13>	2×1514273422…79<13>
6	Fully factored	14	9433724222…85<14>	5×7²×53×7265093741<10>
7	Fully factored	18	2635266744…56<18>	2⁴×2395357×6875975963<10>
8	Fully factored	21	1168543524…22<21>	2×433×1349357418…67<18>
9	Fully factored	22	4354994459…38<22>	2×179×1216478899…11<20>
10	Fully factored	24	1297422791…52<24>	2³×19×31×173×14197×1121072128…91<14>
11	Composite	27	1376764143…56<27>	2³×71×2423880534…17<24>
↳	Open Open - the last known term is composite and not yet fully factored.

Open end - submit a factor of the remaining composite (24 digits) of term #11:

242388053435442684910717

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

From the command linefdb · curl

fdb

fdb seq view '16' --type 118 --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":"16"},"type":118,"part":"last20","fr":0}}'