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.
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See the expression syntax & functions reference.
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Term #1 of the Home prime · Base 3 sequence of
805
Term #1 of the Inverse home prime · Base 3 sequence of
425
Term #3 of the Inverse home prime · Base 9 sequence of
4
Term #1 of the Home prime · Base 20 sequence of
681
Term #1 of the Home prime · Base 24 sequence of
242
Term #1 of the Home prime · Base 26 sequence of
92
Term #1 of the Aliquot variants · Quasi · σ(n) − n − 1 sequence of
1372
Term #1 of the Inverse home prime · Base 14 sequence of
1313
Term #1 of the Inverse home prime · Base 16 sequence of
267
Term #1 of the Inverse home prime · Base 18 sequence of
395
Term #1 of the Inverse home prime · Base 20 sequence of
497
Term #1 of the Inverse home prime · Base 24 sequence of
649
Term #1 of the Inverse home prime · Base 30 sequence of
799
Term #1 of the Conway climb · Base 3 sequence of
805
Term #1 of the Conway climb · Base 4 sequence of
475
Term #1 of the Conway climb · Base 8 sequence of
1216
Term #1 of the Conway climb · Base 20 sequence of
681
Term #3 of the Conway climb · Base 25 sequence of
38
Term #1 of the Conway climb · Base 26 sequence of
92
Term #1 of the Prime-stopping maps · σ(n) − 1 until a prime sequence of
1313
Term #1 of the Distinct-prime home prime · Base 3 sequence of
805
Term #1 of the Distinct-prime home prime, descending · Base 16 sequence of
267
Is factor of
Primality
Verified directlyproven prime
Checked deterministically (below 300 digits).
From the command linefdb · curl
fdb
fdb number '1427' --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":"1427"},"decimal":false,"detail":2}}'