factordbrpc · fdb
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Inverse home prime · Base 7 of 25787 length 16 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 5 25787 107×241
1 Fully factored 5 82770 2×3×5×31×89
2 Fully factored 7 1506724 22×29×31×419
3 Fully factored 8 49370799 3×409×40237
4 Fully factored 9 676266125 53×23×71×3313
5 Fully factored 11 19099987184<11> 24×61×71×101×2729
6 Fully factored 15 2644386980…66<15> 2×3×4407311633…11<14>
7 Fully factored 16 2159582700…62<16> 2×32×1427×84076255567<11>
8 Fully factored 17 6924041173…12<17> 23×359×2410877846…21<14>
9 Fully factored 20 1985461573…54<20> 2×11×800693×1127126793…49<13>
10 Fully factored 21 3183854216…79<21> 13057771×2438283085…49<14>
11 Fully factored 21 9839351738…14<21> 2×33×89×2047305813…19<18>
12 Fully factored 24 1686044371…05<24> 3×5×8295263×1355025851…89<16>
13 Fully factored 25 2679328853…52<25> 26×3×11×23×5515746157…77<20>
14 Fully factored 30 1090643238…08<30> 23×3×4544346826…67<28>
15 Composite 32 1091097673…10<32> 2×5×8557253×1275055994…47<24>
↳ Open Open - the last known term is composite and not yet fully factored.
Open end - submit a factor of the remaining composite (24 digits) of term #15:
127505599420665897438947
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 '25787' --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":"25787"},"type":17,"part":"last20","fr":0}}'