factordbrpc · fdb
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Home prime · Base 15 of 5558 length 21 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
1 Fully factored 6 125272 23×7×2237
2 Fully factored 8 24427112 23×3053389
3 Fully factored 10 5493334639<10> 13×1303×324301
4 Fully factored 11 34307368051<11> 11×113×27600457
5 Fully factored 12 442211662957<12> 29×773×19726621
6 Fully factored 14 1685495535…21<14> 113×197×239×3167999
7 Fully factored 15 9849984794…24<15> 23×29×163×103079×252691
8 Fully factored 20 1407484706…66<20> 2×47×179×8364939415…91<15>
9 Fully factored 21 2179824689…91<21> 89×197×56859347×218657041
10 Fully factored 22 8855235975…66<22> 2×13×67×5083373120…73<19>
11 Fully factored 23 6399451757…23<23> 53×1207443727…91<22>
12 Fully factored 23 7953571336…16<23> 22×193×1030255354…03<21>
13 Fully factored 26 1092615769…28<26> 27×79×9949386449<10>×108601069831<12>
14 Fully factored 33 1217467053…31<33> 149×1959017×4170928491…07<24>
15 Fully factored 34 8475225522…57<34> 821×2719×9344499481<10>×4062962879…03<18>
16 Fully factored 35 4669099667…28<35> 23×400997×51104531×109499683×2600936594…11<13>
17 Fully factored 38 9252526705…36<38> 25×7×11×3755083890…99<35>
18 Fully factored 43 4680368422…49<43> 47×79×127×227×3180031×1130063205…17<14>×1216722179…31<16>
19 Fully factored 47 2327132110…81<47> 1131781177<10>×1002285783…01<14>×2051478651…53<25>
20 Composite 48 7324433083…03<48> 269×541×3262723×1542567816…09<37>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (37 digits) of term #20:
1542567816186577351162794877212966409
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 '5558' --type 33 --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":"5558"},"type":33,"part":"last20","fr":0}}'