factordbrpc · fdb
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Home prime · Base 19 of 442 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 7 5235074 2×13×227×887
4 Fully factored 9 127838929 17×907×8291
5 Fully factored 11 15314029001<11> 757×20229893
6 Fully factored 11 35633961810<11> 2×32×5×395932909
7 Fully factored 14 1328601158…66<14> 2×1321×5028770473<10>
8 Fully factored 15 2554208333…72<15> 23×11×37×78446201887<11>
9 Fully factored 19 1687839379…01<19> 23×7338432082…87<17>
10 Fully factored 20 1845053809…70<20> 2×5×109×353×10867×56891×77563
11 Fully factored 23 1249085399…26<23> 2×13×61×73×233×710791×651430739
12 Fully factored 25 5328148635…66<25> 2×11×31×7812534655…13<22>
13 Fully factored 28 1845144459…33<28> 3×7×8786402189…73<26>
14 Fully factored 29 4579727174…89<29> 3×67×2278471231…89<27>
15 Fully factored 30 8215687671…39<30> 33×7×4346924694…51<28>
16 Fully factored 33 2947986015…15<33> 32×5×41×223×439×43661×4396481×8502776941…91<13>
17 Fully factored 39 7310549774…99<39> 34897133×2094885495…03<32>
18 Fully factored 40 3248102870…70<40> 2×3×5×7×3890973893<10>×3975137574…39<28>
19 Fully factored 43 3434696806…15<43> 32×5×83×89×651727×4410152067…57<13>×3594914082…99<19>
20 Fully factored 47 3439658897…12<47> 22×3×67×199×1601×1572906957…11<18>×8537129834…27<21>
21 Fully factored 52 2987224558…64<52> 27×3×11×5881×17319871×47818444019<11>×1451953435…69<27>
22 Composite 61 2666430919…92<61> 22×3×1730713×1283878821…07<54>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (54 digits) of term #22:
128387882105132498537334415647468721664706692464802107
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 '442' --type 36 --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":"442"},"type":36,"part":"last20","fr":0}}'