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 aliquot sequence of
257529
Term #1 of the Home prime · Base 2 sequence of
77039
Term #1 of the Home prime · Base 5 sequence of
29585
Term #1 of the Inverse home prime · Base 4 sequence of
16185
Term #1 of the Inverse home prime · Base 11 sequence of
10635
Term #1 of the Largest prime factor · largest prime² - 2 sequence of
293
Term #1 of the Home prime · Base 14 sequence of
3042
Term #2 of the Home prime · Base 28 sequence of
32138
Term #1 of the Home prime · Base 30 sequence of
2805
Term #1 of the Aliquot variants · Quasi · σ(n) − n − 1 sequence of
57192
Term #1 of the Inverse home prime · Base 14 sequence of
79703
Term #2 of the Inverse home prime · Base 30 sequence of
11347
Term #1 of the Conway climb · Base 2 sequence of
77039
Term #1 of the Conway climb · Base 5 sequence of
26675
Term #2 of the Conway climb · Base 28 sequence of
32138
Term #1 of the Conway climb · Base 30 sequence of
2805
Term #1 of the Prime-stopping maps · σ(n) − 1 until a prime sequence of
31488
Term #1 of the Distinct-prime home prime · Base 2 sequence of
77039
Term #3 of the Second-class home prime · Base 3 sequence of
12252
Term #2 of the Second-class home prime · Base 8 sequence of
28240
Term #2 of the Second-class home prime · Base 10 sequence of
75740
Term #3 of the Mid-divisor concatenation · Base 2 sequence of
33652
Term #5 of the Mid-divisor concatenation · Base 8 sequence of
1880
Is factor of
Primality
Verified directlyproven prime
Checked deterministically (below 300 digits).
From the command linefdb · curl
fdb
fdb number '85847' --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":"85847"},"decimal":false,"detail":2}}'