factordbrpc · fdb
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Home prime · Base 8 of 25399 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 25399 11×2309
1 Fully factored 5 47365 5×9473
2 Fully factored 6 173313 33×72×131
3 Fully factored 7 7208579 7×41×25117
4 Fully factored 8 16048669 7×13×31×5689
5 Fully factored 9 967808569 7×13×10635259
6 Fully factored 10 7744931835<10> 3×5×29×281×63361
7 Fully factored 12 253074143105<12> 5×7×7230689803<10>
8 Fully factored 12 410957615627<12> 13×29×727×1499413
9 Fully factored 13 7397459812…29<13> 32×821939979181<12>
10 Fully factored 15 1195691957…89<15> 11×23×332489×1421417
11 Fully factored 16 3198077094…53<16> 149×1019×51437×409499
12 Fully factored 18 3360784812…47<18> 43×34949×388111×576211
13 Fully factored 20 4972933283…47<20> 33×263×7003145027…47<16>
14 Fully factored 22 2024663266…91<22> 3×11×416071×1474590449…37<15>
15 Fully factored 24 1199471632…49<24> 19×6313008590…71<22>
16 Fully factored 24 7241127139…63<24> 3×73×3306450748…77<22>
17 Fully factored 25 7601594121…41<25> 7×23×31×41×14419×24573529×104840861
18 Fully factored 28 1140003730…61<28> 23×853×52859×116387×9445087568…43<13>
19 Composite 30 2298438822…71<30> 3×7661462740…57<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 #19:
76614627406363345673157495557
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 '25399' --type 8 --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":"25399"},"type":8,"part":"last20","fr":0}}'