factordb · 8147175644…<420921>

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 #1000000000001398269 420,921 digits

★

Interesting number. Joel Armengaud, a Paris programmer, Nov 13 1996 on a 90 MHz Pentium (88 hours): the first GIMPS discovery, ten weeks after Cray's last record.

Value

8147175644…11<420921>

term 2^1398269-1

8147175644…11<420921>

Show full digits Permalink

Is factor of

Primality

N+1 primality proofproven prime

Proven by a Morrison (N+1) test, base 0.

N-1 and N+1

From the command linefdb · curl

fdb

fdb number id:1000000000001398269 --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":1000000000001398269},"decimal":false,"detail":2}}'