factordbrpc · fdb
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Home prime · Base 7 of 15657 length 28 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
8 Fully factored 14 9374951525…37<14> 83×157×233×2789×11071
9 Fully factored 16 2773610675…93<16> 37×7496245068…89<14>
10 Fully factored 16 8682291468…48<16> 23×32×79×19571×77994101
11 Fully factored 20 6395043291…89<20> 13×19×557×14415083×32245877
12 Fully factored 22 2565750215…95<22> 5×11×19×277×953×1051×46993×188317
13 Fully factored 25 2406989948…46<25> 2×658403×1213049×1506864272…09<13>
14 Fully factored 26 6309835169…43<26> 39971×1578603279…33<22>
15 Fully factored 27 3752285551…12<27> 24×13×263×11729591×17024911×34348603
16 Fully factored 30 8838524522…85<30> 3×5×283×653×407707×261371989×2992138447<10>
17 Fully factored 32 7113497740…57<32> 47×4858194483…83<14>×3115375810…57<17>
18 Fully factored 33 8762959117…69<33> 67×347×3769176789…81<29>
19 Fully factored 34 8724448642…67<34> 7103×8369×18397×4507811317<10>×1769741642…69<13>
20 Fully factored 36 9229916676…01<36> 17×19×232×43×17837×7042864260…33<25>
21 Fully factored 39 2659509463…87<39> 32×13×131×1471×605887×1765769×7301929×1509970914…53<13>
22 Fully factored 42 8909058838…03<42> 3×41×2514256957…59<16>×2880826180…79<25>
23 Fully factored 43 6908328895…80<43> 24×5×19×4544953220…59<40>
24 Fully factored 46 1440160820…11<46> 3×7477287289…03<13>×6420157314…79<32>
25 Fully factored 47 1392590361…73<47> 32×151×367×2792144331…41<41>
26 Fully factored 48 7387635882…91<48> 133×17×431×3613517×1270045065…17<35>
27 Composite 51 9631271889…81<51> 72031×1337100955…51<47>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (47 digits) of term #27:
13371009551046634573798070482322083712547706451
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 '15657' --type 7 --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":"15657"},"type":7,"part":"last20","fr":0}}'