factordbrpc · fdb
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Conway climb · Base 9 of 4151 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 5696 26×89
2 Fully factored 5 17585 5×3517
3 Fully factored 5 36322 2×11×13×127
4 Fully factored 8 10225081 29×352589
5 Fully factored 8 15764378 2×72×160861
6 Fully factored 9 120797968 24×313×24121
7 Fully factored 9 965534320 24×5×67×180137
8 Fully factored 10 8774271047<10> 17×83×6218477
9 Fully factored 12 537057109673<12> 72×19×14983×38501
10 Fully factored 14 1842505354…52<14> 23×59×347×419×268487
11 Fully factored 15 4972106420…09<15> 73×1429×4766343377<10>
12 Fully factored 17 1507490094…15<17> 5×547×1283×9029×475807
13 Fully factored 18 8631358924…51<18> 41×947×46477×478307569
14 Fully factored 20 5558006138…98<20> 2×298169×9320228022…21<14>
15 Fully factored 21 2802284244…20<21> 25×5×13×67×1153×1743993010…89<13>
16 Fully factored 23 2321550707…14<23> 2×7×2333050963<10>×710764801727<12>
17 Fully factored 24 2275037555…79<24> 61×32063×90947×1278987212…99<13>
18 Fully factored 25 4909065617…90<25> 2×5×4909065617…29<24>
19 Fully factored 26 1700256027…56<26> 22×17×37×83×6053×244781×54951204389<11>
20 Composite 29 9521776434…52<29> 22×17×1400261240…89<28>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (28 digits) of term #20:
1400261240354382623393261389
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 '4151' --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":"4151"},"type":94,"part":"last20","fr":0}}'