7 · 218233956 + 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:||7 · 218233956 + 1|
|Verification status (*):||Proven|
|Official Comment (*):||Divides Fermat F(18233954)|
|Unofficial Comments:||This prime has 1 user comment below.|
|Proof-code(s): (*):||L4965 : Propper, LLR|
|Decimal Digits:||5488969 (log10 is 5488968.5407153)|
|Rank (*):||19 (digit rank is 1)|
|Entrance Rank (*):||17|
|Currently on list? (*):||short|
|Submitted:||10/1/2020 22:34:30 CDT|
|Last modified:||10/6/2020 12:50:03 CDT|
|Score (*):||51.8512 (normalized score 1583.056)|
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.
User comments about this prime (disclaimer):
User comments are allowed to convey mathematical information about this number, how it was proven prime.... See our guidelines and restrictions.
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 131289 person_id 9 machine Using: Xeon (pool) 4c+4c 3.5GHz what prime notes Command: /home/caldwell/clientpool/1/pfgw64 -t -q"7*2^18233956+1" 2>&1 PFGW Version 126.96.36.199BIT.20191203.x86_Dev [GWNUM 29.8] Primality testing 7*2^18233956+1 [N-1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 3 Calling Brillhart-Lehmer-Selfridge with factored part 100.00% 7*2^18233956+1 is prime! (118541.5002s+0.0077s) [Elapsed time: 32.93 hours] modified 2021-04-20 17:39:26 created 2020-10-01 22:36:01 id 176977