factordbrpc · fdb
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Inverse home prime · Base 30 of 551 length 24 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
4 Fully factored 5 18407 79×233
5 Fully factored 6 209779 19×61×181
6 Fully factored 7 4888849 7×29×24083
7 Fully factored 8 21675577 7×112×157×163
8 Fully factored 10 3965149237<10> 72×41×271×7283
9 Fully factored 13 5309526547…17<13> 13×31×89×107×1383493
10 Fully factored 17 3025699451…43<17> 17×307×5797469728…97<13>
11 Fully factored 18 1565316826…27<18> 53897×2904274498…91<13>
12 Fully factored 19 2352462344…97<19> 19×29×4269441640…47<16>
13 Fully factored 19 3842497476…89<19> 101×4817×86627×91172171
14 Fully factored 22 1794541843…01<22> 7×213947×2940053×407562473
15 Fully factored 24 2406615647…17<24> 149×6373×48823×87697×59192591
16 Fully factored 27 9437210943…49<27> 41801×15753585359<11>×1433103579…11<13>
17 Fully factored 29 2538699997…01<29> 41×2591×2389792054…71<24>
18 Fully factored 31 5807194692…41<31> 31×1002944162…97<13>×1867789533…63<18>
19 Fully factored 34 3308733125…31<34> 13×769×4799×6647917×1037422609…81<20>
20 Fully factored 36 1837763030…83<36> 54319×137191×2466108175…27<26>
21 Fully factored 38 1618013573…19<38> 59×433×5023×9326092473…61<13>×1352008298…59<17>
22 Fully factored 40 5819952399…59<40> 293×17627×94704755581<11>×1189875768…49<23>
23 Composite 42 1897046304…93<42> 10211×1857845758…63<38>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (38 digits) of term #23:
18578457588281401786754988600094078363
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 '551' --type 80 --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":"551"},"type":80,"part":"last20","fr":0}}'