P · Proven prime
Enter a value, an expression, or a term with a variable like 10^n+1 to list a range.
Switch to Database id to look a number up by its stored id.
Reading never stores anything; use Create to add a number to the database.
See the expression syntax & functions reference.
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Term #1 of the Home prime · Base 2 sequence of
1841
Term #1 of the Home prime · Base 8 sequence of
1841
Term #3 of the Inverse home prime · Base 5 sequence of
279
Term #1 of the Home prime · Base 12 sequence of
412
Term #1 of the Home prime · Base 18 sequence of
3113
Term #2 of the Home prime · Base 26 sequence of
921
Term #1 of the Home prime · Base 27 sequence of
455
Term #1 of the Home prime · Base 33 sequence of
969
Term #1 of the Home prime · Base 34 sequence of
1137
Term #1 of the Aliquot variants · Augmented · σ(n) − n + 1 sequence of
2394
Term #1 of the Aliquot variants · Quasi · σ(n) − n − 1 sequence of
3460
Term #2 of the Inverse home prime · Base 17 sequence of
38
Term #2 of the Inverse home prime · Base 28 sequence of
1219
Term #1 of the Inverse home prime · Base 34 sequence of
565
Term #1 of the Conway climb · Base 2 sequence of
1841
Term #1 of the Conway climb · Base 8 sequence of
1841
Term #1 of the Conway climb · Base 12 sequence of
412
Term #1 of the Conway climb · Base 18 sequence of
3113
Term #2 of the Conway climb · Base 26 sequence of
921
Term #1 of the Conway climb · Base 27 sequence of
455
Term #1 of the Conway climb · Base 33 sequence of
969
Term #1 of the Conway climb · Base 34 sequence of
1137
Term #1 of the Distinct-prime home prime · Base 2 sequence of
1841
Term #2 of the Distinct-prime home prime · Base 8 sequence of
1797
Term #1 of the Second-class home prime · Base 2 sequence of
3682
Term #5 of the Second-class home prime · Base 8 sequence of
808
Term #2 of the Mid-divisor concatenation · Base 2 sequence of
1372
Term #4 of the Mid-divisor concatenation · Base 8 sequence of
108
Term #1 of the Mid-divisor concatenation · Base 10 sequence of
1786
Is factor of
Primality
Verified directlyproven prime
Checked deterministically (below 300 digits).
From the command linefdb · curl
fdb
fdb number '3847' --detail 2
curl
curl -s 'https://factordb.com:4059/rpc' -H 'Content-Type: application/json' -d '{"jsonrpc":"2.0","id":1,"method":"get_number","params":{"target":{"expr":"3847"},"decimal":false,"detail":2}}'