129431439657 · 2170172 + 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: | 129431439657 · 2170172 + 1 |
|---|---|
| Verification status (*): | Proven |
| Official Comment (*): | Cunningham chain 2nd kind (2p-1) |
| Proof-code(s): (*): | L3494 : Batalov, NewPGen, LLR |
| Decimal Digits: | 51238 (log10 is 51237.988461913) |
| Rank (*): | 56010 (digit rank is 1) |
| Entrance Rank (*): | 47348 |
| Currently on list? (*): | no |
| Submitted: | 3/28/2015 01:20:55 CDT |
| Last modified: | 3/28/2015 01:50:27 CDT |
| Database id: | 119649 |
| Status Flags: | TrialDiv |
| Score (*): | 37.4925 (normalized score 0.0009) |
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.
- Cunningham Chains (2nd kind) (archivable class *)
- Prime on list: no, rank 8, weight 37.21466245796
Subcategory: "Cunningham chain 2nd kind (2p-1)"
(archival tag id 217974, tag last modified 2020-06-02 14:12:08)
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 119649 person_id 9 machine Using: Xeon 4c+4c 3.5GHz what prime notes Command: /home/caldwell/client/pfgw/pfgw64 -t -q"129431439657*2^170172+1" 2>&1 PFGW Version 3.7.7.64BIT.20130722.x86_Dev [GWNUM 27.11] Primality testing 129431439657*2^170172+1 [N-1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 5 Calling Brillhart-Lehmer-Selfridge with factored part 99.98% 129431439657*2^170172+1 is prime! (14.0736s+0.0003s) [Elapsed time: 14.00 seconds] modified 2020-07-07 17:30:17 created 2015-03-28 01:21:01 id 165259
Query times: 0.0004 seconds to select prime, 0.0006 seconds to seek comments.
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