factordbrpc · fdb
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Home prime · Base 17 of 455 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 4 5574 2×3×929
3 Fully factored 6 182710 2×5×112×151
4 Fully factored 7 3314692 22×828673
5 Fully factored 8 51943525 52×1019×2039
6 Fully factored 10 2177389596<10> 22×3×4481×40493
7 Fully factored 12 252732581989<12> 354181×713569
8 Fully factored 12 502887085686<12> 2×33×9312723809<10>
9 Fully factored 16 1274473221…68<16> 22×19×23×6089×119741119
10 Fully factored 21 1032362075…26<21> 2×112×4265958991…03<18>
11 Fully factored 22 2221666883…71<22> 73×251×593×2044690911…89<15>
12 Fully factored 23 6110735300…26<23> 2×46769×24160933×27039066319<11>
13 Fully factored 26 1040430096…11<26> 479×2172087883…09<23>
14 Fully factored 27 1145374175…96<27> 23×3×2682457×1779112358…97<19>
15 Fully factored 30 7213965603…95<30> 5×101×5786414582…91<13>×2468727430…69<15>
16 Fully factored 32 3087323281…18<32> 2×83×229841×8091825662…53<24>
17 Fully factored 34 3815318847…71<34> 37×72295609×374319689×3810434687…83<16>
18 Fully factored 35 6199914500…86<35> 2×47×1319324251…91<14>×4999266643…09<20>
19 Fully factored 38 1773034677…41<38> 33×94693×5615017×1235049927…43<25>
20 Fully factored 42 1282943823…70<42> 2×5×41×71×2029×10589×3306788751…71<15>×6203288617…57<15>
21 Composite 46 7741269912…49<46> 79×8893×1101886409…67<41>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (41 digits) of term #21:
11018864093247080169494463267915843731567
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 '455' --type 34 --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":"455"},"type":34,"part":"last20","fr":0}}'