(257131 - 1)/61481396117165983261035042726614288722959856631
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:||(257131 - 1)/61481396117165983261035042726614288722959856631|
|Verification status (*):||PRP|
|Official Comment (*):||Mersenne cofactor, ECPP|
|Unofficial Comments:||This prime has 1 user comment below.|
|Proof-code(s): (*):||c59 : Metcalfe, OpenPFGW, Primo|
|Decimal Digits:||17152 (log10 is 17151.355938558)|
|Rank (*):||71940 (digit rank is 1)|
|Entrance Rank (*):||63078|
|Currently on list? (*):||short|
|Submitted:||12/16/2015 07:12:42 CDT|
|Last modified:||12/16/2015 07:50:29 CDT|
|Status Flags:||Verify, TrialDiv|
|Score (*):||34.1109 (normalized score 0)|
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.
- Elliptic Curve Primality Proof (archivable *)
- Prime on list: no, rank 80
(archival tag id 218148, tag last modified 2022-06-26 16:37:20)
- Mersenne cofactor (archivable *)
- Prime on list: yes, rank 9
Subcategory: "Mersenne cofactor"
(archival tag id 218149, tag last modified 2022-06-13 13:37:10)
User comments about this prime (disclaimer):
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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 120768 person_id 9 machine Using: Xeon 4c+4c 3.5GHz what prp notes Command: /home/caldwell/client/pfgw/pfgw64 -tc -q"(2^57131-1)/61481396117165983261035042726614288722959856631" 2>&1 PFGW Version 188.8.131.52BIT.20130722.x86_Dev [GWNUM 27.11] Primality testing (2^57131-1)/6148139611...2959856631 [N-1/N+1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 3 Running N+1 test using discriminant 7, base 1+sqrt(7) Calling N+1 BLS with factored part 0.05% and helper 0.03% (0.19% proof) (2^57131-1)/6148139611...2959856631 is Fermat and Lucas PRP! (22.1880s+0.1431s) [Elapsed time: 23.00 seconds] modified 2020-07-07 17:30:17 created 2015-12-16 07:21:01 id 166397