factordbrpc · fdb
Sign in
Show
Open
Inverse home prime · Base 13 of 553 length 26 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
6 Fully factored 13 7729524610…17<13> 3×17359×148424921
7 Fully factored 14 5510913441…23<14> 3×337×1051×51864443
8 Fully factored 16 3254416913…26<16> 2×2389×681125348117<12>
9 Fully factored 18 2528970738…40<18> 22×5×167×7571768678…51<14>
10 Fully factored 20 2811344708…15<20> 5×1628579×3452512537…77<13>
11 Fully factored 21 2166400416…41<21> 809×832621×321619852669<12>
12 Fully factored 22 3410617525…83<22> 31×277×359×3962489×279208759
13 Fully factored 25 1099349977…51<25> 11×17×5878876885…73<22>
14 Fully factored 26 1291589251…13<26> 19×491×41491×3336840339…67<17>
15 Fully factored 28 4600117766…44<28> 23×17×33282079×210412931×4830000421<10>
16 Fully factored 32 9179398303…94<32> 2×3×17851×8570386629…99<27>
17 Fully factored 34 4136761931…51<34> 2129×1943053983…19<31>
18 Fully factored 34 4268889602…72<34> 25×11×3877×9161×44743067×7631463400…89<16>
19 Fully factored 40 1885463911…07<40> 3×47×197×1533881×3191429×1386615435…59<23>
20 Fully factored 43 1559324030…12<43> 22×32×7×17×3639878690…43<39>
21 Fully factored 47 2283969898…65<47> 3×5×19×46492725347<11>×1723695354…27<34>
22 Fully factored 49 6786837384…49<49> 7×137×2631387277…79<21>×2689453660…09<26>
23 Fully factored 50 8638091825…72<50> 22×32×23×499×569×3674300464…29<42>
24 Fully factored 55 8560416497…06<55> 2×43×9712×46171×2286592124…61<43>
25 Composite 58 9003173835…99<58> 53×439×739×30427×78497×2192293083…17<42>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (42 digits) of term #25:
219229308379928977725611337528657294202117
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 '553' --type 63 --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":"553"},"type":63,"part":"last20","fr":0}}'