factordbrpc · fdb
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Inverse home prime · Base 13 of 2809 length 17 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 2809 532
1 Fully factored 4 9010 2×5×17×53
2 Fully factored 7 1516673 761×1993
3 Fully factored 7 4379382 2×32×7×34757
4 Fully factored 9 992710604 22×709×350039
5 Fully factored 12 129967150276<12> 22×127×255840847
6 Fully factored 13 7307070452…58<13> 2×32×829×489684389
7 Fully factored 16 2363613017…62<16> 2×23×41×283×4428414349<10>
8 Fully factored 19 3612393629…26<19> 2×7×19×1358042718…11<17>
9 Fully factored 21 3878705806…75<21> 52×37×1601×2619110222…07<15>
10 Fully factored 23 1643452823…03<23> 563×1627×33668417×532891259
11 Fully factored 24 1613994970…62<24> 2×89×979831×1887199×490358041
12 Fully factored 26 2509941424…30<26> 2×5×71×5431398359<10>×6508689905…17<13>
13 Fully factored 28 1971320148…66<28> 2×3×11×89×173×311×6237588585…53<19>
14 Fully factored 32 1117875921…14<32> 2×3×7591×2454388797…09<27>
15 Fully factored 34 1184686593…01<34> 233×32543503×23862073993<11>×6547493350…43<13>
16 Composite 36 1244348739…24<36> 26×32×7×11×103×2723903256…29<29>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (29 digits) of term #16:
27239032561626019732713378929
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 '2809' --type 63 --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":"2809"},"type":63,"part":"last20","fr":0}}'