factordbrpc · fdb
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Inverse home prime · Base 22 of 2469 length 21 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
1 Fully factored 5 18109 7×13×199
2 Fully factored 5 96609 3×32203
3 Fully factored 6 708469 23×30803
4 Fully factored 8 14908675 52×31×19237
5 Fully factored 10 4506397791<10> 3×7×17×109×115807
6 Fully factored 12 596827830041<12> 37×14533×1109921
7 Fully factored 15 1258427434…93<15> 79×433×863×4262873
8 Fully factored 17 1063313109…03<17> 3×38388433×92329297
9 Fully factored 18 2303023111…65<18> 5×617×10391×7184321899<10>
10 Fully factored 20 1792027000…87<20> 13×1378482307…99<19>
11 Fully factored 20 3032661077…91<20> 41×2971×2489644676…81<15>
12 Fully factored 22 1283071247…97<22> 13033×9844788210…09<17>
13 Fully factored 23 2306200706…37<23> 68903429099<11>×334700425963<12>
14 Fully factored 24 4040735214…95<24> 3×5×23×210191×498367×11180929363<11>
15 Fully factored 28 3162079280…29<28> 937×3917×1377269×6255482589…29<15>
16 Fully factored 30 3655192961…41<30> 101×225909491×1601970291…51<20>
17 Fully factored 32 1934009420…37<32> 59×313×339406962899<12>×3085613233…89<16>
18 Fully factored 33 8726424572…23<33> 29×193×214453229×7270234891…71<21>
19 Fully factored 36 4248131302…53<36> 32×1993276431…21<13>×2368033764…77<23>
20 Composite 39 3044108027…65<39> 5×47×1295365118…79<37>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (37 digits) of term #20:
1295365118200087579232599692639011579
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 '2469' --type 72 --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":"2469"},"type":72,"part":"last20","fr":0}}'