387 · 21930200 + 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:387 · 21930200 + 1
Verification status (*):Proven
Official Comment (*):[none]
Proof-code(s): (*):L1129 : Slomma, PSieve, Srsieve, PrimeGrid, LLR
Decimal Digits:581051   (log10 is 581050.68534158)
Rank (*):3683 (digit rank is 1)
Entrance Rank (*):293
Currently on list? (*):yes
Submitted:8/8/2013 20:31:13 CDT
Last modified:8/9/2013 00:20:29 CDT
Database id:114983
Status Flags:none
Score (*):44.9665 (normalized score 1.3697)

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.
machineDitto P4 P4
notesCommand: /home/ditto/client/TrialDiv/TrialDiv -q 387 2 1930200 1 2>&1 [Elapsed time: 10.872 seconds]
modified2020-07-07 17:30:18
created2013-08-08 20:35:02

machineWinXP Dual Core 2.6GHz 64-bit Laptop
notesCommand: pfgw64.exe -t -q"387*2^1930200+1" 2>&1 PFGW Version [GWNUM 27.8] Primality testing 387*2^1930200+1 [N-1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 5 Calling Brillhart-Lehmer-Selfridge with factored part 100.00% 387*2^1930200+1 is prime! (1552.5750s+0.0031s) [Elapsed time: 1553 seconds]
modified2020-07-07 17:30:18
created2013-08-08 23:34:43

Query times: 0.0003 seconds to select prime, 0.0004 seconds to seek comments.
Printed from the PrimePages <primes.utm.edu> © Chris Caldwell.