factordbrpc · fdb
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Home prime · Base 26 of 99 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 5 19677 3×7×937
3 Fully factored 7 1494897 3×107×4657
4 Fully factored 8 37529417 4801×7817
5 Fully factored 8 84390193 17×4964129
6 Fully factored 9 206947521 33×11×696793
7 Fully factored 12 651634763513<12> 27259×23905307
8 Fully factored 13 8420759043…91<13> 32×7×5387×24812111
9 Fully factored 17 1147420542…11<17> 32×7×1821302448…97<15>
10 Fully factored 19 7755620031…85<19> 3×5×364673269×1417820771<10>
11 Fully factored 22 5357256886…23<22> 3×1992×617×88469×826111717
12 Fully factored 25 3735752570…29<25> 11×113×3005432477…03<22>
13 Fully factored 27 3292054055…27<27> 79×6299×7757×11966953×7126739447<10>
14 Fully factored 29 6082562466…35<29> 3×5×193×4931×245671×1734399395…73<17>
15 Fully factored 32 4315308855…01<32> 105359×4095814174…39<27>
16 Fully factored 32 8075463417…23<32> 3×23×3475740725…59<14>×3367216111…13<17>
17 Fully factored 34 1363931157…73<34> 32×7×151×229037×6259927552…33<24>
18 Fully factored 36 7401718449…09<36> 3×186533693×1322677658…71<28>
19 Fully factored 38 2218562995…67<38> 79×13724383×233539676621<12>×8761756305…11<17>
20 Fully factored 41 1265178065…19<41> 7×1025029×115296211×77281873861<11>×1978904254…63<15>
21 Composite 44 1993509243…71<44> 3×9767×6803553612…71<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 #21:
680355361235562958986182080780809080371
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 '99' --type 43 --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":"99"},"type":43,"part":"last20","fr":0}}'