factordbrpc · fdb
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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.

P · Proven prime
below threshold 5 digits
↪
Term #1 of the aliquot sequence of 466151 · 2 terms
Term #1 of the Home prime · Base 3 sequence of 8919 · 2 terms
Term #1 of the Home prime · Base 7 sequence of 8319 · 2 terms
Term #1 of the Home prime · Base 13 sequence of 18958 · 2 terms
Term #1 of the Home prime · Base 22 sequence of 40141 · 2 terms
Term #2 of the Home prime · Base 26 sequence of 23363 · 3 terms
Term #1 of the Home prime · Base 30 sequence of 25202 · 2 terms
Term #1 of the Home prime · Base 31 sequence of 14038 · 2 terms
Term #1 of the Aliquot variants · Augmented · σ(n) − n + 1 sequence of 27000 · 2 terms
Term #1 of the Inverse home prime · Base 22 sequence of 12467 · 2 terms
Term #1 of the Conway climb · Base 3 sequence of 26757 · 2 terms
Term #1 of the Conway climb · Base 7 sequence of 8319 · 2 terms
Term #1 of the Conway climb · Base 12 sequence of 8433 · 2 terms
Term #1 of the Conway climb · Base 13 sequence of 11056 · 2 terms
Term #1 of the Conway climb · Base 22 sequence of 40141 · 2 terms
Term #2 of the Conway climb · Base 26 sequence of 23363 · 3 terms
Term #1 of the Conway climb · Base 30 sequence of 25202 · 2 terms
Term #1 of the Conway climb · Base 31 sequence of 14038 · 2 terms
Term #1 of the Second-class home prime · Base 3 sequence of 17838 · 2 terms
Term #4 of the Second-class home prime · Base 16 sequence of 4060 · 5 terms
Term #1 of the Mid-divisor concatenation · Base 3 sequence of 29730 · 2 terms
Term #1 of the Mid-divisor concatenation · Base 10 sequence of 39666 · 2 terms
Is factor of

Primality

Verified directlyproven prime

Checked deterministically (below 300 digits).

From the command linefdb · curl
fdb
fdb number '66601' --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":"66601"},"decimal":false,"detail":2}}'