factordbrpc · fdb
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Home prime · Base 18 of 638 length 27 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.
nStatus DigitsTermFactorization
7 Fully factored 17 1284566573…61<17> 479×2681767376…59<14>
8 Fully factored 17 3081138610…87<17> 72×643×12613×77532857
9 Fully factored 20 4989151019…41<20> 19×10381597×252934973087<12>
10 Fully factored 22 2344418242…59<22> 863×460609×5897824930…77<13>
11 Fully factored 24 1048319179…53<24> 11×145411247×6553945830…09<14>
12 Fully factored 25 7958805092…33<25> 7×17×227×2946287007…41<21>
13 Fully factored 27 1017741509…53<27> 7×1153×5876239×20643487×103950751
14 Fully factored 29 2972971745…51<29> 2851100322…17<13>×1042745399…03<17>
15 Fully factored 29 5936836184…59<29> 107×1571×380920251821<12>×927173563507<12>
16 Fully factored 31 7975234195…31<31> 7×13×17×5155290365…73<28>
17 Fully factored 33 1872870458…81<33> 719×881×4073×683437×1062160247…79<18>
18 Fully factored 35 1732338776…39<35> 7×41×5853403×102168613×1009311000…23<18>
19 Fully factored 38 1802245454…27<38> 13921949×1175217457…49<15>×1101528317…27<17>
20 Fully factored 39 3353610874…91<39> 6869×4882240318…39<35>
21 Fully factored 39 9650407031…83<39> 11×17×19×659×4121592102…29<33>
22 Fully factored 42 1761997397…17<42> 7×2517139138…31<41>
23 Fully factored 43 1883363915…07<43> 303091×6213856284…77<37>
24 Fully factored 44 1379584763…61<44> 12049×258107×4436061944…27<34>
25 Fully factored 45 1776953614…75<45> 52×11×94261×23397421×2929836363…49<30>
26 Composite 46 8227588810…13<46> 2063×3988167140…51<43>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (43 digits) of term #26:
3988167140319599977623464492772686053497851
Check for factors - let the server run a small P-1 / P+1 / ECM step on the composite:
level 0 done · takes up to a minute
From the command linefdb · curl
fdb
fdb seq view '638' --type 35 --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":"638"},"type":35,"part":"last20","fr":0}}'