factordb · sequences

Sequence

Start with

Show

whole sequence last 20 terms last term range to

Open

Conway climb · Base 15 of 5367 length 18 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	5367	3×1789
1	Fully factored	5	11914	2×7×23×37
2	Fully factored	7	1878337	277×6781
3	Fully factored	8	14029906	2×11×637723
4	Fully factored	8	31772098	2×43×127×2909
5	Fully factored	9	374803409	8597×43597
6	Fully factored	9	435266722	2×11×31×499×1279
7	Fully factored	12	105433310404<12>	2²×26358327601<11>
8	Fully factored	13	1256545827…01<13>	23×29×25639×73477
9	Fully factored	15	2000787118…02<15>	2×13×59×130429408003<12>
10	Fully factored	16	5613245331…53<16>	47×1126519×106017521
11	Fully factored	17	9166364465…71<17>	11×13763×67021×9034007
12	Fully factored	19	4935880147…82<19>	2×17×23×15683×402465548447<12>
13	Fully factored	22	3068127183…72<22>	2²×7×1019×1075328467…71<18>
14	Fully factored	24	7201796669…71<24>	757×9513601941…03<21>
15	Fully factored	25	1119715513…28<25>	2²×13×827×1030469903<10>×25267573069<11>
16	Fully factored	27	1640166775…44<27>	2⁴×17×37×797×5503×3715861752…31<16>
17	Composite	31	8604661610…31<31>	8604661610…31<31>
↳	Open Open - the last known term is composite and not yet fully factored.

Open end - submit a factor of the remaining composite (31 digits) of term #17:

8604661610252230806511166617831

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 '5367' --type 100 --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":"5367"},"type":100,"part":"last20","fr":0}}'