factordbrpc · fdb
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Inverse home prime · Base 7 of 53015 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 6 952647 3×103×3083
3 Fully factored 7 7403007 3×17×379×383
4 Fully factored 9 315547088 24×739×26687
5 Fully factored 12 153847019426<12> 2×76923509713<11>
6 Fully factored 12 538464567993<12> 3×11×16317108121<11>
7 Fully factored 13 5596768085…83<13> 3×1865589361…61<13>
8 Fully factored 14 1305912553…30<14> 2×5×117529×11111407
9 Fully factored 14 6405505594…65<14> 3×5×433×1499×6579193
10 Fully factored 16 1858459357…63<16> 3×37×1674287709…33<14>
11 Fully factored 16 5742806842…81<16> 4273×5011×268205027
12 Fully factored 17 7576128186…73<17> 29×3323×24919×31549201
13 Fully factored 19 3056770884…80<19> 24×32×5×4245515117…19<16>
14 Fully factored 22 3496364256…86<22> 2×1748182128…93<22>
15 Fully factored 23 1223727489…53<23> 32×2297×167623×3531405608…07<13>
16 Fully factored 24 3421543947…53<24> 547×6255107764…99<21>
17 Fully factored 25 1501851374…46<25> 2×3×2503085623…41<24>
18 Fully factored 26 1226511955…32<26> 22×3066279889…33<25>
19 Fully factored 27 1502477145…33<27> 13×17×287291×2366429550…03<19>
20 Fully factored 28 4679204436…66<28> 2×56688893×4127091030…31<20>
21 Composite 29 8160607464…86<29> 2×17×107×1789×1253861169…73<23>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (23 digits) of term #21:
12538611692979658977073
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 '53015' --type 17 --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":"53015"},"type":17,"part":"last20","fr":0}}'