factordbrpc · fdb
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Home prime · Base 15 of 5315 length 23 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
3 Fully factored 6 967676 22×241919
4 Fully factored 8 24541919 1873×13103
5 Fully factored 8 94833728 26×11×134707
6 Fully factored 14 1853519798…32<14> 23×23×6841×14725153
7 Fully factored 18 9382661361…03<18> 183823×5104182480…61<13>
8 Fully factored 19 1590029175…86<19> 2×7×112×13×7220185158…63<14>
9 Fully factored 20 1654636318…63<20> 23×79×20245483×449800033
10 Fully factored 22 2300746387…58<22> 2×7×211×6823×1141518321…49<15>
11 Fully factored 23 5606881909…24<23> 24×31387×149551×746555841197<12>
12 Fully factored 28 2405031831…97<28> 149×1614115322…53<26>
13 Fully factored 29 1116406434…78<29> 2×29×1924838679…41<27>
14 Fully factored 30 5377617999…66<30> 2×47×113×69255427×7310209786…89<18>
15 Fully factored 33 1256255782…14<33> 2×7×23×293×1451663×5007167707<10>×183187837799<12>
16 Fully factored 37 7114464429…74<37> 2×1771552460…57<16>×2007974527…41<22>
17 Fully factored 39 1255604216…66<39> 2×17×157×275886473×8525969775…59<26>
18 Fully factored 42 3026755215…34<42> 2×78157×2014154141…27<14>×9613614852…03<23>
19 Fully factored 44 6889694366…53<44> 534739×559649×2066893×1113844002…11<27>
20 Fully factored 46 5190931118…36<46> 22×7×11×89×101×223×8407721276…11<37>
21 Fully factored 49 3595548414…36<49> 22×17×44357×18210329×8487268512…33<15>×7712733549…23<20>
22 Composite 53 1197156835…73<53> 569×8231×9354797×2732447420…31<39>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (39 digits) of term #22:
273244742035192145905702309727658743131
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 '5315' --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":"5315"},"type":33,"part":"last20","fr":0}}'