491 · 23473837 + 1
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At this site we maintain a list of the 5000 Largest Known Primes which is updated hourly. This list is the most important databases at The Prime Pages: a collection of research, records and results all about prime numbers. This page summarizes our information about one of these primes.

This prime's information:

field (help)value
Description:491 · 23473837 + 1
Verification status (*):Proven
Official Comment:
Unofficial Comments:This prime has 1 user comment below.
Proof-code(s): (*):L4343 : Norton, PSieve, Srsieve, PrimeGrid, LLR
Decimal Digits:1045732   (log10 is 1045731.82812887)
Rank (*):203 (digit rank is 1)
Entrance Rank (*):154
Currently on list? (*):short
Submitted:8/29/2016 13:12:49 CDT
Last modified:8/29/2016 14:50:45 CDT
Database id:122104
Status Flags:TrialDiv
Score (*):46.7702 (normalized score 20.4645)

User comments about this prime (disclaimer):

User comments are allowed to convey mathematical information about this number, how it was proven prime.... See our guidelines and restrictions.

PrimeGrid writes (27 Nov 2016): 
For more details, see the Official Announcement.

Verification data:

The Top 5000 Primes is a list for proven primes only. In order to maintain the integrity of this list, we seek to verify the primality of all submissions.  We are currently unable to check all proofs (ECPP, KP, ...), but we will at least trial divide and PRP check every entry before it is included in the list.
fieldvalue
prime_id122104
person_id9
machineUsing: Xeon (pool) 4c+4c 3.5GHz
whatprime
notesCommand: /home/caldwell/clientpool/1/pfgw64 -t -q"491*2^3473837+1" 2>&1
PFGW Version 3.7.7.64BIT.20130722.x86_Dev [GWNUM 27.11]
Primality testing 491*2^3473837+1 [N-1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Calling Brillhart-Lehmer-Selfridge with factored part 100.00%


491*2^3473837+1 is prime! (5101.6373s+0.0012s)
[Elapsed time: 85.03 minutes]
modified2017-01-27 05:57:11
created2016-08-29 13:13:01
id167743

Query times: 0.0002 seconds to select prime, 0.0003 seconds to seek comments.