factordbrpc · fdb
Sign in
Show
Open
Inverse home prime · Base 21 of 4069 length 15 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 4069 13×313
1 Fully factored 4 6586 2×37×89
2 Fully factored 6 825008 24×51563
3 Fully factored 11 10028043251<11> 887×11305573
4 Fully factored 12 104700912440<12> 23×5×463×587×9631
5 Fully factored 18 1606449910…32<18> 22×11×3651022523…03<16>
6 Fully factored 20 3381211958…78<20> 2×4027×4198177252…57<16>
7 Fully factored 21 8164657101…86<21> 2×17×191×8629×1457018938…61<14>
8 Fully factored 23 2624220113…40<23> 23×5×79×107×181×4287960980…77<15>
9 Fully factored 28 7152267879…95<28> 5×43×162829×274609×7439757669…73<15>
10 Fully factored 31 5472557414…39<31> 71×109×1471×37938259721<11>×1267113161…11<14>
11 Fully factored 35 1812692415…83<35> 13×52369×2662603412…39<29>
12 Fully factored 36 1087434125…01<36> 3475993073…33<17>×3128412810…97<19>
13 Fully factored 36 4832533654…50<36> 2×52×17×19×229×4057×2357297890…51<13>×1366304198…13<14>
14 Composite 40 3801310082…18<40> 2×883×2152497215…73<37>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (37 digits) of term #14:
2152497215716558970833670939377943773
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 '4069' --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":"4069"},"type":71,"part":"last20","fr":0}}'