factordb · sequences

Sequence

Start with

Show

whole sequence last 20 terms last term range to

Open

Conway climb · Base 35 of 2245 length 15 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	4	2245	5×449
1	Fully factored	4	6574	2×19×173
2	Fully factored	6	109198	2×71×769
3	Fully factored	7	3088994	2×347×4451
4	Fully factored	9	119925826	2×1181×50773
5	Fully factored	10	5448820148<10>	2²×359×521×7283
6	Fully factored	13	4651307073…83<13>	13×41131×8698861
7	Fully factored	14	3143466601…11<14>	1624603×19349137
8	Fully factored	14	8532721503…62<14>	2×3×43×291857×1133177
9	Fully factored	18	2014712254…02<18>	2×3²×53×71×199×1061×1109×12703
10	Fully factored	24	3024284620…53<24>	3×13²×343247893×1737828125…03<13>
11	Fully factored	26	1710537339…28<26>	2²×3×4423×980899×3285565138…97<15>
12	Fully factored	30	4478079136…72<30>	2³×3×17×53×137×1117×1353262325…07<21>
13	Fully factored	36	6814157037…57<36>	3×11×4643×4447331621…03<31>
14	Composite	38	3788159928…78<38>	2×1894079964…39<38>
↳	Open Open - the last known term is composite and not yet fully factored.

Open end - submit a factor of the remaining composite (38 digits) of term #14:

18940799644338852175299516077080115939

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 '2245' --type 120 --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":"2245"},"type":120,"part":"last20","fr":0}}'