factordbrpc · fdb
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Inverse home prime · Base 4 of 3970 length 37 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
17 Fully factored 18 9539664764…22<18> 2×109×4375993011…79<16>
18 Fully factored 19 4481016843…34<19> 2×9371×66863×3575812879<10>
19 Fully factored 20 6143199749…90<20> 2×5×13×4725538268…83<18>
20 Fully factored 21 4838951187…46<21> 2×3×29×97×2867016937…57<17>
21 Fully factored 22 7515712880…14<22> 2×103×4733×8537×902944743989<12>
22 Fully factored 24 2481995613…14<24> 2×32×31×41×73×89×379×4405861868…51<13>
23 Fully factored 26 7750874168…42<26> 2×879575781017<12>×4406029779…63<14>
24 Fully factored 27 1937792389…22<27> 2×9688961948…11<26>
25 Fully factored 27 3875584779…46<27> 2×3×13×167×1163×2558270442…17<20>
26 Fully factored 28 6867304926…94<28> 2×3×17×859×14717×2105431×2529488405…29<13>
27 Fully factored 30 1822688486…42<30> 2×3×17×19×163×4567×5703360041<10>×22151812819<11>
28 Fully factored 33 1046089783…10<33> 2×5×3833×2729167190…07<28>
29 Fully factored 33 7154348038…42<33> 2×11×19×2579×12553×16831834039<11>×3140967700…83<13>
30 Fully factored 35 1483280059…78<35> 2×53681×1381568952…19<30>
31 Fully factored 35 3621700115…62<35> 2×1129×1603941592…39<32>
32 Fully factored 36 2627897904…94<36> 2×37×83×103×2333×1009020163<10>×1764602411…61<18>
33 Fully factored 38 1302046762…06<38> 2×59×275447×1484453×2698609696…87<24>
34 Fully factored 39 3038364405…26<39> 2×43×869521×310737403×1307578591…07<23>
35 Fully factored 40 3768838692…26<40> 2×472×683×9181×231443×5877966373…63<24>
36 Composite 41 4235521147…50<41> 2×53×1694208458…47<39>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (39 digits) of term #36:
169420845890442413025642863062790980747
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 '3970' --type 14 --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":"3970"},"type":14,"part":"last20","fr":0}}'