At this site we maintain a list of the 5000 Largest Known Primes which is updated hourly. This list is the most important databases at The Prime Pages: 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:||(17887525 - 1)2 - 2|
|Verification status (*):||Proven|
|Unofficial Comments:||This prime has 2 user comments below.|
|Proof-code(s): (*):||p392 : Batalov, Cksieve, OpenPFGW|
|Decimal Digits:||393937 (log10 is 393936.021404172)|
|Rank (*):||7479 (digit rank is 1)|
|Entrance Rank (*):||3654|
|Currently on list? (*):||no|
|Submitted:||5/21/2016 10:27:44 CDT|
|Last modified:||5/21/2016 17:35:08 CDT|
|Removed (*):||1/19/2018 16:15:38 CDT|
|Score (*):||43.7726 (normalized score 0.6891)|
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.
|machine||Using: Xeon 4c+4c 3.5GHz|
|notes||Command: /home/caldwell/client/pfgw/pfgw64 -tc -q"(178^87525-1)^2-2" 2>&1|
PFGW Version 188.8.131.52BIT.20130722.x86_Dev [GWNUM 27.11]
Primality testing (178^87525-1)^2-2 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N-1 test using base 5
Running N+1 test using discriminant 13, base 2+sqrt(13)
Running N+1 test using discriminant 13, base 3+sqrt(13)
Calling N+1 BLS with factored part 50.00% and helper 0.00% (150.01% proof)
(178^87525-1)^2-2 is prime! (24436.9732s+0.0114s)
[Elapsed time: 6.79 hours]
Query times: 0.0005 seconds to select prime, 0.0007 seconds to seek comments.