factordbrpc · fdb
Sign in
Show
Open
Inverse home prime · Base 21 of 3349 length 17 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
0 Fully factored 4 3349 17×197
1 Fully factored 4 4154 2×31×67
2 Fully factored 6 621140 22×5×13×2389
3 Fully factored 9 464737751 103×281×16057
4 Fully factored 10 3122905441<10> 1993×1566937
5 Fully factored 11 14511405550<11> 2×52×37×1571×4993
6 Fully factored 15 1888559532…13<15> 31×1559×3739×1045123
7 Fully factored 17 3952955551…92<17> 23×389×60601×209605441
8 Fully factored 21 1664854196…77<21> 101×1653517×996887538481<12>
9 Fully factored 22 1795482722…19<22> 11×17×127×547×13291×67409×154267
10 Fully factored 26 1050904933…69<26> 17×647×5059759×1888340888…09<15>
11 Fully factored 28 3149730127…92<28> 23×17×397537003×5825817514…49<17>
12 Fully factored 32 2040652797…35<32> 5×19×4801×4474183662…33<26>
13 Fully factored 33 1827301796…78<33> 2×2543×7639×4703242974…57<25>
14 Fully factored 34 8470957026…01<34> 61×9029×140587×1094001272…67<24>
15 Fully factored 35 8689433813…64<35> 22×19×59×113×2762167×6208654599…51<23>
16 Composite 39 4566979230…73<39> 21661×2108387992…93<35>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (35 digits) of term #16:
21083879926769751643398389073028193
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 '3349' --type 71 --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":"3349"},"type":71,"part":"last20","fr":0}}'