
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:  7 · 2^{2139912} + 1 
Verification status (*):  Proven 
Official Comment:  Divides GF(2139911,12) 
Unofficial Comments:  This prime has 1 user comment below. 
Proofcode(s): (*):  g279 : Cooper, NewPGen, PRP, Proth.exe 
Decimal Digits:  644179 (log_{10} is 644178.54517934) 
Rank (*):  1075 (digit rank is 1) 
Entrance Rank (*):  34 
Currently on list? (*):  short 
Submitted:  5/12/2007 15:05:08 CDT 
Last modified:  8/22/2007 22:50:03 CDT 
Database id:  80448 
Status Flags:  none 
Score (*):  45.2832 (normalized score 4.2473) 

Archival tags:
There are certain forms classed as
archivable: these prime may (at times)
remain on this list even if they do not make
the Top 5000 proper. Such primes are tracked with archival
tags.
 Generalized Fermat Divisors (bases 3,5,6,10,12) (archivable *)
 Prime on list: yes, rank 6, weight 47.2291304267237
Subcategory: "Divides GF(*,12)"
(archival tag id 187039, tag last modified 20160315 13:57:15)
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.
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.
field  value 
prime_id  80448 
person_id  9 
machine  RedHat P4 P4 
what  prime 
notes  Command: /home/caldwell/client/pfgw t q"7*2^2139912+1" 2>&1 PFGW Version 20031027.x86_Dev (Beta 'caveat utilitor') [FFT v22.13 w/P4] Primality testing 7*2^2139912+1 [N1, BrillhartLehmerSelfridge] Running N1 test using base 3 Using SSE2 FFT Adjusting authentication level by 1 for PRIMALITY PROOF Reduced from FFT(262144,19) to FFT(262144,18) Reduced from FFT(262144,18) to FFT(262144,17) 4279838 bit request FFT size=(262144,17) Calling BrillhartLehmerSelfridge with factored part 100.00% 7*2^2139912+1 is prime! (2041.6784s+0.0000s) [Elapsed time: 33487 seconds]

modified  20070530 21:58:14 
created  20070512 15:10:15 
id  89991 

field  value 
prime_id  80448 
person_id  9 
machine  RedHat P4 P4 
what  trial_divided 
notes  Command: /home/caldwell/client/TrialDiv/TrialDiv q 7 2 2139912 1 2>&1 [Elapsed time: 10.434 seconds]

modified  20070530 21:58:14 
created  20070512 15:22:01 
id  89992 

Query times: 0.0004 seconds to select prime, 0.0003 seconds to seek comments.
