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
id #1100000008512097665 2,250 digits

Value

3955101168…37<2250>
term 2^7473+2^2178+1
Is factor of

Primality

Combined N-1/N+1 proofproven prime

Proven by a combined N-1/N+1 test (Brillhart-Lehmer-Selfridge).

N-1 and N+1

Checking N-1 / N+1 factorization…

From the command linefdb · curl
fdb
fdb number id:1100000008512097665 --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":{"id":1100000008512097665},"decimal":false,"detail":2}}'