factordbrpc · fdb
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Inverse home prime · Base 2 of 28924 length 40 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
20 Fully factored 16 9972365847…18<16> 2×3×173×9043×15313×69379
21 Fully factored 17 7628404489…46<17> 2×41×9302932304…03<15>
22 Fully factored 18 2381550670…34<18> 2×1190775335…67<18>
23 Fully factored 18 4763101340…70<18> 2×32×5×13×937×1787×243130709
24 Fully factored 19 4176953790…94<19> 2×149×1697×1907×4331226257<10>
25 Fully factored 20 1860247512…62<20> 2×33×29×41×1171×106657×2319791
26 Fully factored 21 3264816733…14<21> 2×33×41×151×109001×8959293451<10>
27 Fully factored 22 4925423663…26<22> 2×32×4093×6685429952…99<17>
28 Fully factored 23 1752545349…70<23> 2×5×7×13×47×83663×4897749635…57<13>
29 Fully factored 24 1682853960…34<24> 2×3×5651×4963292516…39<19>
30 Fully factored 24 6505486767…38<24> 2×229×302513×28715963×163510969
31 Fully factored 25 2945551771…82<25> 2×7×139×751×947×4339×130079×3770831
32 Fully factored 26 3477978635…38<26> 2×577×4993×8111×7441922339…89<15>
33 Fully factored 27 2045620036…06<27> 2×32×347×5437×22021009×273543526517<12>
34 Fully factored 28 2463861048…54<28> 2×173×41×113×953×1381×3967×10366409773<11>
35 Fully factored 29 9561325403…62<29> 2×37×463×55691×8574211×5844215277…01<13>
36 Fully factored 30 8422401838…14<30> 2×3×29×11549×4191238052…89<24>
37 Fully factored 31 3515865305…78<31> 2×101×769×1501984667<10>×1506915917…93<17>
38 Fully factored 32 1696636490…62<32> 2×3×7×41×97×1015743196…43<27>
39 Composite 33 1065083937…66<33> 2×13×4096476684…91<31>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (31 digits) of term #39:
4096476684353346967550523676091
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 '28924' --type 12 --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":"28924"},"type":12,"part":"last20","fr":0}}'