factordbrpc · fdb
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Home prime · Base 25 of 685 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 3 685 5×137
1 Fully factored 4 3262 2×7×233
2 Fully factored 5 35858 2×17929
3 Fully factored 6 799179 3×271×983
4 Fully factored 8 33532233 3×7×1019×1567
5 Fully factored 11 20035454692<11> 22×11×29×15701767
6 Fully factored 15 2000498203…67<15> 3×31×467×1373×3354809
7 Fully factored 18 1818415966…59<18> 112×107×787×17846347931<11>
8 Fully factored 21 4264284381…31<21> 3×13×29×43×3307×77191×34349011
9 Fully factored 26 5124981434…61<26> 593×8642464477…77<23>
10 Fully factored 27 3452578538…02<27> 2×67×79×3261457149…07<23>
11 Fully factored 30 4791678255…07<30> 33×7×19×41281×3232377199…17<22>
12 Fully factored 35 1110328508…17<35> 37×3000887860…41<33>
13 Fully factored 36 1317504949…66<36> 2×3×1613×1361340100…97<32>
14 Fully factored 39 1179128753…47<39> 3×11×19×175403×1072152769…87<31>
15 Fully factored 40 4817144532…87<40> 1283×1639422760…97<13>×2290192881…37<25>
16 Fully factored 41 7124466377…37<41> 17×283×9817×33503×519907×1142875849<10>×7577566838…19<14>
17 Composite 45 3784690718…19<45> 1167581×3241480221…99<39>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (39 digits) of term #17:
324148022131576768443129712780546937399
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 '685' --type 42 --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":"685"},"type":42,"part":"last20","fr":0}}'