factordbrpc · fdb
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Inverse home prime · Base 33 of 2041 length 22 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
2 Fully factored 7 1912517 17×112501
3 Fully factored 7 3712550 2×52×41×1811
4 Fully factored 11 70875675752<11> 23×7×1265637067<10>
5 Fully factored 16 1500945576…12<16> 23×131×267863×5346763
6 Fully factored 21 2481512180…91<21> 1433×1731690286…27<18>
7 Fully factored 22 6223175382…32<22> 22×1555793845…83<22>
8 Fully factored 25 1694259497…55<25> 5×157×461×5507×176431×4818583339<10>
9 Fully factored 28 8036864628…44<28> 22×994984957×2019343250…23<19>
10 Fully factored 31 2840021750…84<31> 23×17×41×61×109×337×209942417×1082710813…29<13>
11 Fully factored 40 2332187118…25<40> 53×17×1201288258…57<13>×9136023865…77<24>
12 Fully factored 43 1523787841…38<43> 2×103×7397028356…73<40>
13 Fully factored 45 2658270080…02<45> 2×1329135040…51<45>
14 Fully factored 46 4386145632…85<46> 5×29×31×229×379×421×479×4243×134327×19904167×4914515347…21<16>
15 Fully factored 51 4142870068…39<51> 193×2146564802…23<49>
16 Fully factored 52 2337609069…40<52> 22×5×17×31×798904989763<12>×5931625595…77<13>×4680178406…91<23>
17 Fully factored 57 1195553694…52<57> 23×7×373×3195368861…71<18>×1791229480…99<35>
18 Fully factored 62 3858354665…28<62> 22×17×269×2109312631…59<58>
19 Fully factored 65 8254877879…21<65> 1099662966…87<23>×7506734458…83<43>
20 Fully factored 66 4499457475…18<66> 2×7×449×1289×98999×254196119×2206648372…57<46>
21 Composite 72 1440356882…70<72> 2×5×1440356882…27<71>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (71 digits) of term #21:
14403568826490890207855020022829987492415007030856844507469457320622227
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 '2041' --type 83 --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":"2041"},"type":83,"part":"last20","fr":0}}'