factordbrpc · fdb
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Inverse home prime · Base 24 of 226 length 22 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
2 Fully factored 5 34538 2×7×2467
3 Fully factored 7 1421162 2×19×149×251
4 Fully factored 8 83362058 2×13×73×167×263
5 Fully factored 11 50315531642<11> 2×25157765821<11>
6 Fully factored 12 603786379706<12> 2×41×353×3929×5309
7 Fully factored 15 5844211329…38<15> 2×4599677×63528497
8 Fully factored 17 1214048494…22<17> 2×7×9721×89206614163<11>
9 Fully factored 18 7103187268…78<18> 2×200329×1772880428…41<13>
10 Fully factored 20 1411678025…82<20> 2×2953×2390243862…97<16>
11 Fully factored 21 7930255477…46<21> 2×29×499×2069×1324335889…27<14>
12 Fully factored 25 1457766891…82<25> 2×14369×6620927×7661481239…07<13>
13 Fully factored 27 4857638137…38<27> 2×34171×81020593×8772877355…23<14>
14 Fully factored 30 1334952204…90<30> 2×5×7×41×293×10357×1532788464…87<20>
15 Fully factored 33 9718397098…50<33> 2×52×7×13×71×3008325986…97<28>
16 Fully factored 38 1379760116…90<38> 2×5×13×23×71×1229×5153×1026270924…93<26>
17 Fully factored 42 3747977070…02<42> 2×7×41×1838191362…63<20>×3552174659…21<20>
18 Fully factored 45 2479114940…70<45> 2×5×20807×4701841271<10>×2534073642…61<30>
19 Fully factored 49 5330606391…86<49> 2×17918431×22364879×1183541513…77<14>×5619485990…41<21>
20 Fully factored 53 3122878963…74<53> 2×17×71×4229×4192033×5631114852…59<13>×1295869067…57<27>
21 Composite 57 3000602321…18<57> 2×1500301160…09<57>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (57 digits) of term #21:
150030116059166991496255935125792429372781480127808731309
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 '226' --type 74 --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":"226"},"type":74,"part":"last20","fr":0}}'