8787 · 21475091 + 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:8787 · 21475091 + 1
Verification status (*):Proven
Official Comment (*):[none]
Proof-code(s): (*):L1204 : Brown1, PSieve, Srsieve, PrimeGrid, LLR
Decimal Digits:444051   (log10 is 444050.581174604)
Rank (*):5672 (digit rank is 1)
Entrance Rank (*):2786
Currently on list? (*):no
Submitted:2/14/2018 20:13:12 CDT
Last modified:2/14/2018 20:50:22 CDT
Removed (*):2/24/2020 10:26:35 CDT
Database id:124350
Status Flags:TrialDiv
Score (*):44.1405 (normalized score 0.9052)

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.
machineUsing: Xeon 4c+4c 3.5GHz
notesCommand: /home/caldwell/client/pfgw/pfgw64 -t -q"8787*2^1475091+1" 2>&1 PFGW Version [GWNUM 27.11] Primality testing 8787*2^1475091+1 [N-1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 5 Calling Brillhart-Lehmer-Selfridge with factored part 100.00% 8787*2^1475091+1 is prime! (999.0147s+0.0007s) [Elapsed time: 16.65 minutes]
modified2020-07-07 17:30:15
created2018-02-14 20:21:01

Query times: 0.0005 seconds to select prime, 0.0004 seconds to seek comments.
Printed from the PrimePages <primes.utm.edu> © Chris Caldwell.