factordbrpc · fdb
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Inverse home prime · Base 25 of 1417 length 16 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 4 1417 13×109
1 Fully factored 4 2738 2×372
2 Fully factored 6 579052 22×144763
3 Fully factored 8 90476927 47×1925041
4 Fully factored 10 1203150672<10> 24×34×31×29947
5 Fully factored 19 2855973224…02<19> 2×13×181787×604251811321<12>
6 Fully factored 21 1475224148…27<21> 3×28379311×1732746023…19<13>
7 Fully factored 23 1057584242…53<23> 6450589501<10>×1639515648…53<13>
8 Fully factored 24 2501702344…26<24> 2×3×19×105713303×2075874727…03<14>
9 Fully factored 26 7918833648…02<26> 2×3×71×1858881138…77<24>
10 Fully factored 29 7261254445…77<29> 11×17×101×701×2011×220589×1236330930…49<14>
11 Fully factored 33 4605691621…11<33> 36×7×132×77849×257297×20043691×1330200551<10>
12 Fully factored 42 1890328677…03<42> 31×6097834443…13<40>
13 Fully factored 43 3811146526…56<43> 25×103×269×18013×2386327875…63<33>
14 Fully factored 51 3555905632…02<51> 2×373×51803×1009789512…99<17>×9112250130…21<27>
15 Composite 54 3315017286…02<54> 2×1657508643…51<54>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (54 digits) of term #15:
165750864304512604104825699536270725298523328041434351
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 '1417' --type 75 --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":"1417"},"type":75,"part":"last20","fr":0}}'