factordbrpc · fdb
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Inverse home prime · Base 10 of 3398 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 4 3398 2×1699
1 Fully factored 5 16992 25×32×59
2 Fully factored 9 593322222 2×3×2803×35279
3 Fully factored 11 35279280332<11> 22×19×29×41×390413
4 Fully factored 14 3904134129…22<14> 2×149×2351×55725739
5 Fully factored 16 5572573923…92<16> 22×31×43×21283×49105807
6 Fully factored 19 4910580721…22<19> 2×59×19267×22871×94439047
7 Fully factored 21 9443904722…92<21> 23×7×13×23×37×59×811273×31847227
8 Fully factored 26 3184722781…22<26> 2×3×251×1289×1640566145…83<20>
9 Fully factored 29 1640566145…32<29> 22×9072×3719×731066473×1833733141<10>
10 Fully factored 31 1833733141…22<31> 2×72×1871156267…89<29>
11 Fully factored 32 1871156267…72<32> 22×3×11743×288203×2043497×2254640219…37<15>
12 Fully factored 36 2254640219…22<36> 2×11×149×691×268937×3701175658…97<24>
13 Fully factored 39 3701175658…12<39> 23×223×5704589770…69<16>×3636808458…97<20>
14 Fully factored 42 3636808458…22<42> 2×3×23×2851×4086149×20241709×1117590621…09<23>
15 Fully factored 46 1117590621…32<46> 22×11×587×769×1019×23357681×43043177×5492339888…17<20>
16 Fully factored 50 5492339888…22<50> 2×269×997×221497×8499731×270555053×103780778201<12>×1937021179…87<13>
17 Composite 54 1937021179…92<54> 22×4993×6143×8861×1781761456…07<42>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (42 digits) of term #17:
178176145673469308856429129509648077600807
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 '3398' --type 20 --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":"3398"},"type":20,"part":"last20","fr":0}}'