factordb · sequences

Sequence

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whole sequence last 20 terms last term range to

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Conway climb · Base 21 of 99 length 13 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	99	3²×11
1	Fully factored	4	1376	2⁵×43
2	Fully factored	5	20770	2×5×31×67
3	Fully factored	7	9154345	5×23²×3461
4	Fully factored	9	433325651	11×127×313×991
5	Fully factored	11	20333554462<11>	2×13×37×21136751
6	Fully factored	13	2083451748…83<13>	29×139×12973×39841
7	Fully factored	15	4889764488…62<15>	2×5783×24113×1753289
8	Fully factored	17	1930507501…07<17>	23×73×51031×225313243
9	Fully factored	19	3578526857…50<19>	2×5⁴×2862821485…83<16>
10	Fully factored	19	7292487885…14<19>	2×149×2447143585…43<17>
11	Fully factored	21	1592854928…34<21>	2×13²×23×109×4793×74929×523417
12	Composite	25	1655243390…08<25>	2²×4138108475…27<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 #12:

413810847590228510525227

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 '99' --type 106 --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":"99"},"type":106,"part":"last20","fr":0}}'