6611 · 26611 + 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.
This prime's information:
| Description: | 6611 · 26611 + 1 |
|---|---|
| Verification status (*): | Proven |
| Official Comment (*): | Cullen |
| Proof-code(s): (*): | K : Keller |
| Decimal Digits: | 1994 (log10 is 1993.9295684917) |
| Rank (*): | 108295 (digit rank is 1) |
| Entrance Rank (*): | 64 |
| Currently on list? (*): | yes |
| Submitted: | 1984 |
| Last modified: | 3/11/2023 15:54:10 UTC |
| Database id: | 37374 |
| Status Flags: | none |
| Score (*): | 27.4277 (normalized score 0) |
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.
- Cullen primes (archivable *)
- Prime on list: yes, rank 12
Subcategory: "Cullen primes"
(archival tag id 176231, tag last modified 2023-03-11 15:53:59)
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 37374 person_id 9 machine Using: Xeon (pool) 4c+4c 3.5GHz what prime notes Command: /home/caldwell/clientpool/4/pfgw64 -t -q"6611*2^6611+1" 2>&1 PFGW Version 4.0.1.64BIT.20191203.x86_Dev [GWNUM 29.8] Primality testing 6611*2^6611+1 [N-1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 3 Calling Brillhart-Lehmer-Selfridge with factored part 99.82% 6611*2^6611+1 is prime! (0.0120s+0.0001s) [Elapsed time: 0.00 seconds] modified 2020-07-07 22:30:10 created 2019-12-06 23:44:11 id 175845
Query times: 0.0002 seconds to select prime, 0.0003 seconds to seek comments.
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