factordbrpc · fdb
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Home prime · Base 31 of 874 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 3 874 2×19×23
1 Fully factored 4 2534 2×7×181
2 Fully factored 5 66490 2×5×61×109
3 Fully factored 8 61934637 3×997×20707
4 Fully factored 10 2692233377<10> 28607×94111
5 Fully factored 11 26419259358<11> 2×32×2309×635659
6 Fully factored 14 5552258832…46<14> 2×23×47×25681123183<11>
7 Fully factored 16 2248686657…35<16> 5×13583627×33108781
8 Fully factored 18 1390979034…23<18> 13×91909×116417747219<12>
9 Fully factored 20 1031800466…81<20> 89×1171×3709×26692668011<11>
10 Fully factored 22 2174121507…80<22> 23×3×5×173×239×2503×2999×58374241
11 Fully factored 31 1388391907…49<31> 11×37×122387×60589453×4600291411…37<15>
12 Fully factored 34 7126442956…45<34> 5×61333×2674813277<10>×8687906345…69<19>
13 Fully factored 37 3143266298…14<37> 2×32×17×47×5836708822…07<16>×3744500247…61<17>
14 Fully factored 43 1203492935…90<43> 2×5×103×4133×2114003×1337319927…67<30>
15 Fully factored 47 3695053565…43<47> 2749×671436411421<12>×7538985813…17<14>×2655389194…51<18>
16 Fully factored 49 1514083785…18<49> 2×7×1081488418…87<48>
17 Composite 50 3661911230…96<50> 27×17×43×1012×192461×1993402415…77<36>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (36 digits) of term #17:
199340241508820595633368040264911177
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 '874' --type 48 --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":"874"},"type":48,"part":"last20","fr":0}}'