factordbrpc · fdb
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Inverse home prime · Base 28 of 12121 length 17 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 12121 17×23×31
1 Fully factored 5 24965 5×4993
2 Fully factored 6 139809 3×29×1607
3 Fully factored 8 35277679 127×229×1213
4 Fully factored 9 745757391 3×19×61×214483
5 Fully factored 12 131833311207<12> 3×13×1871×1806703
6 Fully factored 14 3109402496…35<14> 5×6218804992…87<13>
7 Fully factored 15 1741265397…41<15> 47×443×84163×99367
8 Fully factored 17 3754110290…99<17> 3×86069×330839×439463
9 Fully factored 19 4648845682…91<19> 3×1103×328249×4280011651<10>
10 Fully factored 22 1616996954…67<22> 19×4326169×1967216326…97<14>
11 Fully factored 22 9479824736…39<22> 3×11×30187×9516262506…09<16>
12 Fully factored 25 4585794631…55<25> 5×2617×3504619512…23<21>
13 Fully factored 27 2154135411…69<27> 41×5253988807…09<25>
14 Fully factored 28 4119127224…97<28> 29×5279×121283×2218480497…49<18>
15 Fully factored 31 2346809822…01<31> 1759×608339×345868613×6340963392…77<13>
16 Composite 32 4122965050…39<32> 11×251×1493286870…99<29>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (29 digits) of term #16:
14932868707450148711016280999
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 '12121' --type 78 --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":"12121"},"type":78,"part":"last20","fr":0}}'