factordbrpc · fdb
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Inverse home prime · Base 9 of 5891 length 21 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
1 Fully factored 5 11140 22×5×557
2 Fully factored 6 406478 2×167×1217
3 Fully factored 7 7986242 2×112×61×541
4 Fully factored 10 2591196338<10> 2×17×59×103×12541
5 Fully factored 12 539855053274<12> 2×23×11735979419<11>
6 Fully factored 13 8555528996…60<13> 22×5×43×577×17241403
7 Fully factored 15 7421858986…08<15> 212×67×677×3994747
8 Fully factored 23 6662113706…87<23> 7×42889837×2219011766…93<15>
9 Fully factored 23 8596906235…17<23> 13×41×20593×7832409067…93<16>
10 Fully factored 25 3034435750…84<25> 23×3793044688…23<24>
11 Fully factored 27 2765129578…49<27> 41×89×797×579598787×164042294459<12>
12 Fully factored 30 2215968152…97<30> 43×59×38261×71039×75941×201203×2103193
13 Fully factored 33 1223001418…67<33> 11×367×397×499×192529219×7942925877…63<15>
14 Fully factored 34 9656743558…04<34> 24×67×107×7129×39761×2970066835…29<21>
15 Fully factored 39 4012119886…97<39> 19×211×1457767353…71<17>×6865143589…23<19>
16 Fully factored 40 6760593646…52<40> 23×11×47×20261×50123×53101×3031123765…19<23>
17 Fully factored 44 2984962485…84<44> 22×1595403796…01<17>×4677440426…21<27>
18 Fully factored 45 6318528434…70<45> 2×5×55637509×7345460433…21<15>×1546070319…83<22>
19 Fully factored 47 8990358246…92<47> 22×11×19×83×2434064711…21<18>×5323049537…79<25>
20 Composite 52 2785805376…01<52> 7×41×101×9610533605…23<47>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (47 digits) of term #20:
96105336052485632298429198368633977252311777323
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 '5891' --type 19 --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":"5891"},"type":19,"part":"last20","fr":0}}'