factordbrpc · fdb
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Home prime · Base 19 of 289 length 20 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 3 289 172
1 Fully factored 3 340 22×5×17
2 Fully factored 5 14552 23×17×107
3 Fully factored 7 5232802 2×79×33119
4 Fully factored 9 104420240 24×5×1305253
5 Fully factored 12 681238042628<12> 22×112×13×5273×20533
6 Fully factored 15 2489913417…33<15> 3×1853807×44771173
7 Fully factored 15 4366848049…97<15> 3×1455616016…99<15>
8 Fully factored 16 6785506358…82<16> 2×7×14556937×33295399
9 Fully factored 18 1002840153…41<18> 11×53×1720137483…27<15>
10 Fully factored 19 8906551248…91<19> 34×2161×5088265748…51<14>
11 Fully factored 23 1735467700…30<23> 2×3×5×7×10063789×8211749973…87<13>
12 Fully factored 26 8167537767…95<26> 5×135743287259<12>×1203379987…01<15>
13 Fully factored 28 3871490121…95<28> 3×5×135273007703<12>×1907988487…71<16>
14 Fully factored 29 4458039049…32<29> 22×3329×3347881533…77<25>
15 Fully factored 32 1043832548…66<32> 2×7993×1499287×231359131×1882433341…73<13>
16 Fully factored 34 3645379906…32<34> 26×176489381×185123778311<12>×1743339763…93<13>
17 Fully factored 40 9244272270…23<40> 73×1237×3371×6463238111…43<31>
18 Fully factored 44 1167922495…62<44> 2×7×61×3733459×3663066192…67<34>
19 Composite 47 2577616974…22<47> 2×1861×6925354579…51<43>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (43 digits) of term #19:
6925354579223998041087623651923936505606051
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 '289' --type 36 --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":"289"},"type":36,"part":"last20","fr":0}}'