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872! + 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:||872! + 1|
|Verification status (*):||Proven|
|Official Comment (*):||Factorial|
|Proof-code(s): (*):||D : Dubner, Cruncher|
|Decimal Digits:||2188 (log10 is 2187.2949763219)|
|Rank (*):||101869 (digit rank is 3)|
|Entrance Rank (*):||32|
|Currently on list? (*):||short|
|Submitted:||1/1/1984 05:59:59 UTC|
|Last modified:||3/11/2023 15:54:10 UTC|
|Score (*):||27.7162 (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.
- Factorial primes (archivable *)
- Prime on list: yes, rank 20
(archival tag id 175918, tag last modified 2023-03-11 15:53:59)
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 33856 person_id 9 machine Linux PII 200 what prime notes PFGW Version 20020311.x86_Dev (Alpha software, 'caveat utilitor') Running N-1 test using base 877 Primality testing 872!+1 [N-1, Brillhart-Lehmer-Selfridge] Calling Brillhart-Lehmer-Selfridge with factored part 33.75% 872!+1 is prime! (16.970000 seconds) modified 2003-03-25 17:23:35 created 2002-12-28 11:50:31 id 55651
Query times: 0.0003 seconds to select prime, 0.0004 seconds to seek comments.
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