
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:  (42417^{9337}  1)/42416 
Verification status (*):  PRP 
Official Comment:  Generalized repunit 
Unofficial Comments:  This prime has 1 user comment below. 
Proofcode(s): (*):  p170 : Wu_T, Primo, OpenPFGW 
Decimal Digits:  43203 (log_{10} is 43202.71297596) 
Rank (*):  53538 (digit rank is 1) 
Entrance Rank (*):  50603 
Currently on list? (*):  short 
Submitted:  11/1/2015 01:32:35 CDT 
Last modified:  11/1/2015 01:50:31 CDT 
Database id:  120509 
Status Flags:  Verify, TrialDiv 
Score (*):  36.966 (normalized score 0.0011) 

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 Repunit (archivable *)
 Prime on list: yes, rank 13
Subcategory: "Generalized Repunit"
(archival tag id 218121, tag last modified 20170604 14:20:22)
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  120509 
person_id  9 
machine  Using: Xeon 4c+4c 3.5GHz 
what  prp 
notes  Command: /home/caldwell/client/pfgw/pfgw64 tc q"(42417^93371)/42416" 2>&1 PFGW Version 3.7.7.64BIT.20130722.x86_Dev [GWNUM 27.11] Primality testing (42417^93371)/42416 [N1/N+1, BrillhartLehmerSelfridge] Running N1 test using base 19 Running N+1 test using discriminant 71, base 5+sqrt(71) Calling N1 BLS with factored part 0.18% and helper 0.00% (0.54% proof)
(42417^93371)/42416 is Fermat and Lucas PRP! (157.3114s+0.0010s) [Elapsed time: 2.62 minutes]

modified  20160408 12:40:27 
created  20151101 01:41:02 
id  166138 

Query times: 0.0004 seconds to select prime, 0.0006 seconds to seek comments.
