2 · 1283432757 + 1

At this site we maintain a list of the 5000 Largest Known Primes which is updated hourly. This list is the most important PrimePages database: a collection of research, records and results all about prime numbers. This page summarizes our information about one of these primes.

Description:2 · 1283432757 + 1
Verification status (*):Proven
Official Comment (*):Divides Phi(1283^432757,2)
Proof-code(s): (*):L4879 : Propper, Batalov, Srsieve, LLR
Decimal Digits:1345108   (log10 is 1345107.1441628)
Rank (*):314 (digit rank is 1)
Entrance Rank (*):138
Currently on list? (*):short
Submitted:1/24/2019 00:53:28 CDT
Last modified:1/24/2019 04:50:19 CDT
Database id:125934
Status Flags:TrialDiv
Score (*):47.5424 (normalized score 21.883)

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.
Divides Phi (archivable *)
Prime on list: yes, rank 3
Subcategory: "Divides Phi"
(archival tag id 220030, tag last modified 2020-05-22 18:20:06)

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.
machineUsing: Xeon 4c+4c 3.5GHz
notesCommand: /home/caldwell/client/pfgw/pfgw64 -t -q"2*1283^432757+1" 2>&1 PFGW Version [GWNUM 27.11] Primality testing 2*1283^432757+1 [N-1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 5 Calling Brillhart-Lehmer-Selfridge with factored part 100.00% 2*1283^432757+1 is prime! (12960.7155s+0.0505s) [Elapsed time: 3.60 hours]
modified2020-07-07 17:30:14
created2019-01-24 01:01:02

Query times: 0.0004 seconds to select prime, 0.0006 seconds to seek comments.
Printed from the PrimePages <primes.utm.edu> © Chris Caldwell.