factordbrpc · fdb
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Inverse home prime · Base 7 of 965 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 5 38922 2×3×13×499
3 Fully factored 7 1198759 419×2861
4 Fully factored 7 6869680 24×5×43×1997
5 Fully factored 10 1645350877<10> 59×107×260629
6 Fully factored 11 30662777981<11> 11×2787525271<10>
7 Fully factored 12 136588738290<12> 2×3×5×4691×970573
8 Fully factored 13 5595161810…54<13> 2×137873×20290999
9 Fully factored 15 1169735722…12<15> 24×11×269×12601×196073
10 Fully factored 18 1329817410…76<18> 24×32×79×1613×7247163577<10>
11 Fully factored 21 7021705072…25<21> 3×53×112×103×1143143×131428079
12 Fully factored 25 1498134899…97<25> 3×11×312×79×5979797843…11<18>
13 Fully factored 27 1689144884…66<27> 2×503×298093×5632706779…77<18>
14 Fully factored 28 7796391225…51<28> 3×2598797075…17<28>
15 Fully factored 29 1819157952…22<29> 2×17×83×6446342851…01<25>
16 Fully factored 30 7584057901…39<30> 31×4229×8521×25461251×2666440870…91<14>
17 Fully factored 32 1489329520…43<32> 109×1789×7637548115…43<26>
18 Fully factored 32 6289849287…85<32> 5×17×307×349×6906491970…67<25>
19 Fully factored 34 1950913038…09<34> 29×307×10608583×2065590175…41<23>
20 Fully factored 35 1400930916…62<35> 2×3×17×4561×3011316997…71<29>
21 Composite 37 1215175026…14<37> 2×32×6750972371…23<35>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (35 digits) of term #21:
67509723711180017428781858353589723
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 '965' --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":"965"},"type":17,"part":"last20","fr":0}}'