factordbrpc · fdb
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Distinct-prime home prime, descending · Base 2 of 346 length 62 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
42 Fully factored 15 3254981225…26<15> 2×83×347×20771×272053
43 Fully factored 16 2336922920…98<16> 2×3×17×2291100902…49<14>
44 Fully factored 17 1173043662…74<17> 2×33×83×97×193×307×455381
45 Fully factored 17 1564679267…46<17> 2×3×19×821×167177304859<12>
46 Fully factored 17 8764905481…62<17> 2×34×37×1462279860…23<14>
47 Fully factored 17 1497374576…58<17> 2×3119×64793×37047337
48 Fully factored 17 3977927626…78<17> 2×13×3271×467738356493<12>
49 Fully factored 18 1226148037…90<18> 2×3×5×653×70379×88933499
50 Fully factored 19 1527865888…82<19> 2×97×12613×624403184131<12>
51 Fully factored 19 5237873545…94<19> 2×7×11×3541×9605243117…71<13>
52 Fully factored 20 2014365481…66<20> 2×7×13×19×1277×110569×41256179
53 Fully factored 21 1814465978…66<21> 2×367×14000963×17656103323<11>
54 Fully factored 21 6066590908…58<21> 2×3×99253597×1018702107…69<13>
55 Fully factored 22 2187646118…78<22> 2×161136083×6788194418…33<13>
56 Fully factored 22 7288768257…26<22> 2×32×13×163×757×2524380408…29<15>
57 Fully factored 23 1694083014…58<23> 2×563×5485331×2742795690…43<13>
58 Fully factored 23 9424174233…54<23> 2×19×37×516850063×129686094743<12>
59 Fully factored 24 5703654765…82<24> 2×32×47×3041×190811×1161884718…67<13>
60 Fully factored 25 1277505757…86<25> 2×32×26177×2711255762…51<19>
61 Composite 25 1421478861…34<25> 2×32×7897104784…63<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 #61:
78971047841354171512663
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 '346' --type 130 --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":"346"},"type":130,"part":"last20","fr":0}}'