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 #2 of the Home prime · Base 2 sequence of
250
Term #2 of the Home prime · Base 3 sequence of
377
Term #2 of the Home prime · Base 8 sequence of
250
Term #2 of the Home prime · Base 9 sequence of
377
Term #1 of the Inverse home prime · Base 2 sequence of
1497
Term #1 of the Inverse home prime · Base 4 sequence of
1497
Term #3 of the Home prime · Base 12 sequence of
85
Term #1 of the Home prime · Base 24 sequence of
813
Term #1 of the Home prime · Base 26 sequence of
1294
Term #1 of the Home prime · Base 27 sequence of
1082
Term #1 of the Home prime · Base 28 sequence of
862
Term #1 of the Home prime · Base 29 sequence of
634
Term #1 of the Home prime · Base 30 sequence of
398
Term #1 of the Aliquot variants · Augmented · σ(n) − n + 1 sequence of
1986
Term #1 of the Aliquot variants · Quasi · σ(n) − n − 1 sequence of
1780
Term #1 of the Inverse home prime · Base 24 sequence of
581
Term #1 of the Inverse home prime · Base 28 sequence of
781
Term #2 of the Conway climb · Base 2 sequence of
436
Term #2 of the Conway climb · Base 3 sequence of
377
Term #1 of the Conway climb · Base 8 sequence of
1389
Term #2 of the Conway climb · Base 9 sequence of
377
Term #3 of the Conway climb · Base 12 sequence of
85
Term #1 of the Conway climb · Base 24 sequence of
813
Term #1 of the Conway climb · Base 26 sequence of
1294
Term #1 of the Conway climb · Base 27 sequence of
1082
Term #1 of the Conway climb · Base 28 sequence of
862
Term #1 of the Conway climb · Base 29 sequence of
634
Term #1 of the Conway climb · Base 30 sequence of
398
Term #1 of the Prime-stopping maps · σ(n) − 1 until a prime sequence of
1497
Term #1 of the Distinct-prime home prime · Base 2 sequence of
1389
Term #2 of the Distinct-prime home prime · Base 3 sequence of
377
Term #1 of the Distinct-prime home prime · Base 8 sequence of
1389
Term #1 of the Distinct-prime home prime, descending · Base 2 sequence of
1497
Term #1 of the Second-class home prime · Base 2 sequence of
1422
Term #2 of the Mid-divisor concatenation · Base 2 sequence of
1090
Term #4 of the Mid-divisor concatenation · Base 3 sequence of
161
Term #1 of the Mid-divisor concatenation · Base 8 sequence of
1389
Is factor of
Primality
Verified directlyproven prime
Checked deterministically (below 300 digits).
From the command linefdb · curl
fdb
fdb number '1999' --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":"1999"},"decimal":false,"detail":2}}'