P · Proven prime
Enter a value, an expression, or a term with a variable like 10^n+1 to list a range.
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See the expression syntax & functions reference.
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Term #1 of the Home prime · Base 3 sequence of
1888
Term #1 of the Home prime · Base 10 sequence of
12559
Term #1 of the Inverse home prime · Base 3 sequence of
13106
Term #1 of the Inverse home prime · Base 5 sequence of
3751
Term #1 of the Inverse home prime · Base 8 sequence of
3991
Term #1 of the Home prime · Base 12 sequence of
7183
Term #1 of the Home prime · Base 21 sequence of
1028
Term #1 of the Inverse home prime · Base 25 sequence of
3751
Term #1 of the Conway climb · Base 10 sequence of
12559
Term #1 of the Conway climb · Base 12 sequence of
7183
Term #1 of the Conway climb · Base 14 sequence of
2989
Term #1 of the Conway climb · Base 21 sequence of
1028
Term #1 of the Prime-stopping maps · σ(n) − 1 until a prime sequence of
13106
Term #1 of the Distinct-prime home prime · Base 10 sequence of
12559
Term #1 of the Distinct-prime home prime, descending · Base 3 sequence of
13106
Term #1 of the Distinct-prime home prime, descending · Base 8 sequence of
3991
Term #1 of the Second-class home prime · Base 3 sequence of
3776
Term #3 of the Second-class home prime · Base 16 sequence of
18892
Term #2 of the Mid-divisor concatenation · Base 2 sequence of
8210
Term #1 of the Mid-divisor concatenation · Base 10 sequence of
12559
Is factor of
Primality
Verified directlyproven prime
Checked deterministically (below 300 digits).
From the command linefdb · curl
fdb
fdb number '19661' --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":"19661"},"decimal":false,"detail":2}}'