factordbrpc · fdb
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Home prime · Base 24 of 21809 length 20 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 5 21809 113×193
1 Fully factored 5 65281 97×673
2 Fully factored 7 1341601 59×22739
3 Fully factored 8 19597523 112×149×1087
4 Fully factored 10 2191782463<10> 132×12969127
5 Fully factored 11 62121436327<11> 557×563×198097
6 Fully factored 12 106631345617<12> 1061×100500797
7 Fully factored 12 202860758333<12> 23×1319×6686909
8 Fully factored 13 2542241614…13<13> 61×89×577×811561
9 Fully factored 16 3877407537…09<16> 13×2982621182…93<15>
10 Fully factored 17 2008011697…05<17> 5×37×1085411728…13<15>
11 Fully factored 19 4438852435…21<19> 54787×8102017697…83<14>
12 Fully factored 20 8336842581…71<20> 509221×1637175721…51<15>
13 Fully factored 21 7748721571…55<21> 5×509×2347×1297266429…57<15>
14 Fully factored 23 7129362701…49<23> 157217×65250989×6949668773<10>
15 Fully factored 25 3307179993…29<25> 103×3210854362…43<23>
16 Fully factored 26 2998428142…15<26> 5×11×2339×20521×1135800913…07<17>
17 Fully factored 29 2197077983…11<29> 463×900737×5268251243…81<20>
18 Fully factored 31 1861709520…57<31> 1051×7901×28597×229903×626713×54411829
19 Composite 34 2434928118…17<34> 19×59×89×233×1047453143…21<27>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (27 digits) of term #19:
104745314391912526441851221
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 '21809' --type 41 --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":"21809"},"type":41,"part":"last20","fr":0}}'