factordbrpc · fdb
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Inverse home prime · Base 19 of 4 length 18 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 1 4 22
1 Fully factored 2 40 23×5
2 Fully factored 5 35057 11×3187
3 Fully factored 5 60564 22×3×72×103
4 Fully factored 9 255999580 22×5×109×117431
5 Fully factored 12 290771531145<12> 32×5×6461589581<10>
6 Fully factored 14 4432004293…44<14> 23×5540005367…43<13>
7 Fully factored 17 3799889681…99<17> 53×7169603172…83<15>
8 Fully factored 18 2588226745…16<18> 22×3×61×619×571216298377<12>
9 Fully factored 22 9701288013…60<22> 22×5×17×2853320003…39<20>
10 Fully factored 25 3718475162…67<25> 32×587×1607×1889×34297×6760523179<10>
11 Fully factored 30 1026323611…73<30> 17×43×2077937925…99<13>×6756695912…17<14>
12 Fully factored 31 2841392214…78<31> 2×58549×684388866373<12>×3545510475…07<14>
13 Fully factored 33 5382484491…53<33> 7×53×97×1310131695…59<13>×1141621632…41<17>
14 Fully factored 36 1733110302…37<36> 11×47×167×31397×103991×2399167×2562564485…87<15>
15 Fully factored 38 2668330498…69<38> 3×8894434995…23<37>
16 Fully factored 39 1689942649…40<39> 22×5×13×23593×736817×3739002997…69<26>
17 Composite 43 1572362312…33<43> 7×23×124907×13330241×5865458560…19<28>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (28 digits) of term #17:
5865458560214068827046397419
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 '4' --type 69 --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":"4"},"type":69,"part":"last20","fr":0}}'