factordbrpc · fdb
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Conway climb · Base 9 of 90 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 4 1724 22×431
2 Fully factored 5 15011 17×883
3 Fully factored 6 112420 22×5×7×11×73
4 Fully factored 8 10970956 22×2742739
5 Fully factored 8 98402119 23×4278353
6 Fully factored 9 114286640 24×5×13×109891
7 Fully factored 10 8745502987<10> 13×672730999
8 Fully factored 11 46000928212<11> 22×11500232053<11>
9 Fully factored 12 639121424233<12> 197×3244271189<10>
10 Fully factored 12 690140798186<12> 2×7×5021×9817919
11 Fully factored 13 7276885816…85<13> 5×107×3821×3559711
12 Fully factored 15 1177600149…28<15> 22×19×2473×626556361
13 Fully factored 17 3750368627…13<17> 11×107×1783×17870888743<11>
14 Fully factored 19 1673127309…64<19> 22×13×235537×136604971561<12>
15 Fully factored 21 2451710621…51<21> 6292441×3896279078…11<14>
16 Fully factored 22 1295557840…20<22> 22×5×101×137×2789×1678558014…37<13>
17 Fully factored 25 1640873768…37<25> 19×8636177727…23<23>
18 Fully factored 26 1372642354…54<26> 2×2833×2422595048…69<22>
19 Fully factored 27 1414106002…64<27> 22×72×13×23×31×7783824086…11<20>
20 Composite 29 9799184684…59<29> 9799184684…59<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 #20:
97991846841366150609651119959
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 '90' --type 94 --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":"90"},"type":94,"part":"last20","fr":0}}'