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
1618
Term #1 of the Home prime · Base 4 sequence of
1618
Term #1 of the Home prime · Base 6 sequence of
182
Term #1 of the Home prime · Base 10 sequence of
1714
Term #1 of the Inverse home prime · Base 5 sequence of
1142
Term #1 of the Inverse home prime · Base 6 sequence of
1027
Term #1 of the Home prime · Base 16 sequence of
451
Term #2 of the Home prime · Base 22 sequence of
1059
Term #1 of the Home prime · Base 30 sequence of
105
Term #1 of the Home prime · Base 32 sequence of
1618
Term #1 of the Home prime · Base 36 sequence of
182
Term #1 of the Inverse home prime · Base 26 sequence of
2507
Term #1 of the Inverse home prime · Base 36 sequence of
1027
Term #1 of the Conway climb · Base 2 sequence of
1618
Term #1 of the Conway climb · Base 4 sequence of
1618
Term #1 of the Conway climb · Base 6 sequence of
182
Term #1 of the Conway climb · Base 10 sequence of
1714
Term #1 of the Conway climb · Base 16 sequence of
451
Term #1 of the Conway climb · Base 20 sequence of
833
Term #1 of the Conway climb · Base 30 sequence of
105
Term #1 of the Conway climb · Base 32 sequence of
1618
Term #2 of the Conway climb · Base 36 sequence of
25
Term #1 of the Distinct-prime home prime · Base 2 sequence of
1618
Term #1 of the Distinct-prime home prime · Base 10 sequence of
1714
Term #1 of the Distinct-prime home prime · Base 16 sequence of
451
Term #2 of the Second-class home prime · Base 8 sequence of
1638
Term #2 of the Second-class home prime · Base 16 sequence of
730
Term #1 of the Mid-divisor concatenation · Base 2 sequence of
1618
Term #1 of the Mid-divisor concatenation · Base 10 sequence of
1714
Term #1 of the Mid-divisor concatenation · Base 16 sequence of
451
Is factor of
Primality
Verified directlyproven prime
Checked deterministically (below 300 digits).
From the command linefdb · curl
fdb
fdb number '2857' --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":"2857"},"decimal":false,"detail":2}}'