66444866235 · 2200003 + 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:66444866235 · 2200003 + 1
Verification status (*):Proven
Official Comment:Twin (p+2)
Proof-code(s): (*):L95 : Urushi, LLR
Decimal Digits:60218   (log10 is 60217.724684215)
Rank (*):47394 (digit rank is 15)
Entrance Rank (*):45744
Currently on list? (*):short
Submitted:4/1/2016 20:38:55 CDT
Last modified:4/2/2016 09:20:03 CDT
Database id:121504
Status Flags:TrialDiv
Score (*):37.9907 (normalized score 0.0032)

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.
Twin Primes (archivable *)
Prime on list: yes, rank 5
Subcategory: "Twin (p+2)"
(archival tag id 218310, tag last modified 2016-09-15 05:50:06)

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_id121504
person_id9
machineUsing: Xeon 4c+4c 3.5GHz
whatprime
notesCommand: /home/caldwell/client/pfgw/pfgw64 -t -q"66444866235*2^200003+1" 2>&1
PFGW Version 3.7.7.64BIT.20130722.x86_Dev [GWNUM 27.11]
Primality testing 66444866235*2^200003+1 [N-1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 13
Calling Brillhart-Lehmer-Selfridge with factored part 99.98%


66444866235*2^200003+1 is prime! (20.3554s+0.0001s)
[Elapsed time: 20.00 seconds]
modified2016-04-08 12:40:26
created2016-04-01 20:42:35
id167143

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