31386!7 - 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: | 31386!7 - 1 |
|---|---|
| Verification status (*): | Proven |
| Official Comment (*): | Multifactorial |
| Proof-code(s): (*): | p3 : Dohmen, OpenPFGW |
| Decimal Digits: | 18218 (log10 is 18217.187462274) |
| Rank (*): | 74879 (digit rank is 1) |
| Entrance Rank (*): | 1490 |
| Currently on list? (*): | no |
| Submitted: | 1/14/2000 17:36:09 UTC |
| Last modified: | 3/11/2023 15:54:10 UTC |
| Database id: | 10224 |
| Status Flags: | none |
| Score (*): | 34.2974 (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.
- Multifactorial (tolerated *)
- Prime on list: no, rank 182
Subcategory: "Multifactorial"
(archival tag id 192325, tag last modified 2023-05-01 02:37:23)
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 10224 person_id 9 machine Windows XP P4 1.8GHz what prime notes Primality testing 31386!7-1 [N+1, Brillhart-Lehmer-Selfridge] Calling Brillhart-Lehmer-Selfridge with factored part 33.98% 31386!7-1 is prime! (551.425000 seconds) PFGW Version 20021217.Win_Dev (Beta 'caveat utilitor') [FFT v22.7 w/P4] Running N+1 test using discriminant 5413, base 1+sqrt(5413) modified 2003-03-25 17:23:35 created 2002-12-28 12:15:39 id 55704
Query times: 0.0002 seconds to select prime, 0.0005 seconds to seek comments.
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