81 · 25600028 + 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:||81 · 25600028 + 1|
|Verification status (*):||Proven|
|Official Comment (*):||Generalized Fermat|
|Proof-code(s): (*):||L4965 : Propper, LLR|
|Decimal Digits:||1685779 (log10 is 1685778.3130432)|
|Rank (*):||295 (digit rank is 1)|
|Entrance Rank (*):||278|
|Currently on list? (*):||short|
|Submitted:||8/24/2022 19:03:25 CDT|
|Last modified:||8/24/2022 20:37:08 CDT|
|Score (*):||48.2347 (normalized score 35.9438)|
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.
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 134334 person_id 9 machine Using: Dual Intel Xeon Gold 5222 CPUs 3.8GHz what prime notes Command: /home/caldwell/clientpool/1/pfgw64 -t -q"81*2^5600028+1" 2>&1
PFGW Version 22.214.171.124BIT.20191203.x86_Dev [GWNUM 29.8]
Primality testing 81*2^5600028+1 [N-1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 5
Calling Brillhart-Lehmer-Selfridge with factored part 100.00%
81*2^5600028+1 is prime! (4678.4523s+0.0011s)
[Elapsed time: 77.97 minutes]
modified 2022-08-24 20:22:00 created 2022-08-24 19:04:02 id 180110