factordb · sequences

Sequence

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whole sequence last 20 terms last term range to

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Conway climb · Base 17 of 16 length 18 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	38	2×19
2	Fully factored	3	597	3×199
3	Fully factored	4	1066	2×13×41
4	Fully factored	5	13624	2³×13×131
5	Fully factored	6	185669	11×16879
6	Fully factored	6	935610	2×3×5×13×2399
7	Fully factored	8	53018582	2×131×202361
8	Fully factored	10	1006880974<10>	2×11×45767317
9	Fully factored	11	18511007602<11>	2×19×10739×45361
10	Fully factored	13	4165424169…57<13>	3×1388474723…19<13>
11	Fully factored	13	7436456424…66<13>	2×13×32693×8748587
12	Fully factored	14	9554085161…07<14>	3³×1741427×2031983
13	Fully factored	17	3150363462…40<17>	2³×5×617×1777×1951×368189
14	Fully factored	21	1067727001…00<21>	2⁴×5²×13×53×3874190863…09<15>
15	Fully factored	23	3168638093…36<23>	2²×3×2640531744…03<22>
16	Fully factored	25	8651437469…38<25>	2×61×12953×647551×8454425443…43<13>
17	Composite	28	2597674199…58<28>	2×3×4329456999…43<27>
↳	Open Open - the last known term is composite and not yet fully factored.

Open end - submit a factor of the remaining composite (27 digits) of term #17:

432945699909828922515259543

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 102 --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":102,"part":"last20","fr":0}}'