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:
|Description:||682156 · 79682156 + 1|
|Verification status (*):||Proven|
|Official Comment:||Generalized Cullen|
|Unofficial Comments:||This prime has 1 user comment below.|
|Proof-code(s): (*):||L4472 : Harvanek, Gcwsieve, MultiSieve, PrimeGrid, LLR|
|Decimal Digits:||1294484 (log10 is 1294483.53997003)|
|Rank (*):||109 (digit rank is 1)|
|Entrance Rank (*):||83|
|Currently on list? (*):||short|
|Submitted:||10/9/2016 11:35:56 CDT|
|Last modified:||10/9/2016 16:20:18 CDT|
|Score (*):||47.4248 (normalized score 39.8183)|
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
- Generalized Cullen (archivable *)
- Prime on list: yes, rank 2
Subcategory: "Generalized Cullen"
(archival tag id 218446, tag last modified 2017-08-23 07:50:11)
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.
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.
|machine||Using: Xeon 4c+4c 3.5GHz|
|notes||Command: /home/caldwell/client/pfgw/pfgw64 -t -q"682156*79^682156+1" 2>&1|
PFGW Version 22.214.171.124BIT.20130722.x86_Dev [GWNUM 27.11]
Primality testing 682156*79^682156+1 [N-1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 2
Calling Brillhart-Lehmer-Selfridge with factored part 100.00%
682156*79^682156+1 is prime! (15695.4245s+0.0457s)
[Elapsed time: 4.36 hours]
Query times: 0.0004 seconds to select prime, 0.0007 seconds to seek comments.