factordbrpc · fdb
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Inverse home prime · Base 15 of 395 length 23 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
3 Fully factored 6 198292 22×89×557
4 Fully factored 8 28218182 2×14109091
5 Fully factored 9 211636367 53×137×29147
6 Fully factored 10 1475597753<10> 7×210799679
7 Fully factored 10 3161995192<10> 23×241×719×2281
8 Fully factored 14 8769749340…07<14> 2176351×40295657
9 Fully factored 15 4589927201…76<15> 23×5051×11358956647<11>
10 Fully factored 19 1940784233…32<19> 25×157×3863025942…43<15>
11 Fully factored 23 6600341980…82<23> 2×41×6869×7583×363431×42520273
12 Fully factored 27 2792905196…67<27> 41×6811963892…87<25>
13 Fully factored 28 1532691875…16<28> 25×569×3331×2527074107…67<20>
14 Fully factored 33 2185857406…57<33> 2273×9616618596…09<29>
15 Fully factored 33 3245608776…48<33> 23×1566637×2589630508…13<26>
16 Fully factored 36 9955409627…32<36> 22×2488852406…83<36>
17 Fully factored 38 5599917915…07<38> 92671×1839463×2300115247<10>×1428226734…97<18>
18 Fully factored 40 3166147040…96<40> 25×19×29×2551×12227×5757038479…89<28>
19 Fully factored 47 3781457965…07<47> 17×61×379×15109327×1507585003<10>×717285480103<12>×5888739491…63<13>
20 Fully factored 52 3810955618…17<52> 7×5444222311…31<51>
21 Fully factored 52 8166333467…72<52> 22×19×23×487×9593050276…97<46>
22 Composite 57 3687890792…32<57> 24×112×257×67413947×1099486295…53<44>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (44 digits) of term #22:
10994862955970566440699879275824971199683053
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 '395' --type 65 --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":"395"},"type":65,"part":"last20","fr":0}}'