factordbrpc · fdb
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Inverse home prime · Base 23 of 42367 length 15 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
0 Fully factored 5 42367 13×3259
1 Fully factored 5 74970 2×32×5×72×17
2 Fully factored 10 2563685894<10> 2×7×11×16647311
3 Fully factored 12 202547838919<12> 103×1966483873<10>
4 Fully factored 13 1040269968…20<13> 23×5×7×13×2633×108541
5 Fully factored 18 1954993008…07<18> 151×2957×437841514001<12>
6 Fully factored 19 2818098163…47<19> 7×4025854519…21<18>
7 Fully factored 19 9259465395…90<19> 2×33×5×3429431627…07<17>
8 Fully factored 24 2207299825…65<24> 3×5×28817×1799089×283836769427<12>
9 Fully factored 27 2704424435…61<27> 7×3863463479…23<26>
10 Fully factored 27 8885966002…36<27> 22×2221491500…09<27>
11 Fully factored 30 1175169003…09<30> 67×97×113×181×8840905994…47<21>
12 Fully factored 32 6923400591…29<32> 3×19×29×107×167×601×33245021×1173127660…57<15>
13 Fully factored 38 1654697028…50<38> 2×52×31×239×4466721633…33<32>
14 Composite 42 1520840748…67<42> 3×89×6911×14939×5517089871…69<31>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (31 digits) of term #14:
5517089871613802389971314823569
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 '42367' --type 73 --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":"42367"},"type":73,"part":"last20","fr":0}}'