4891 · 21102896 + 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:4891 · 21102896 + 1
Verification status (*):Proven
Official Comment (*):[none]
Proof-code(s): (*):L3516 : Hipp, PSieve, Srsieve, PrimeGrid, LLR
Decimal Digits:332009   (log10 is 332008.46749548)
Rank (*):15331 (digit rank is 1)
Entrance Rank (*):2634
Currently on list? (*):no
Submitted:7/2/2013 05:50:16 CDT
Last modified:7/2/2013 07:50:28 CDT
Removed (*):2/18/2014 02:35:47 CDT
Database id:114556
Status Flags:none
Score (*):43.247 (normalized score 0.3238)

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.
machineRedHat P4 P4
notesCommand: /home/caldwell/client/TrialDiv/TrialDiv -q 4891 2 1102896 1 2>&1 [Elapsed time: 10.311 seconds]
modified2020-07-07 17:30:19
created2013-07-02 05:52:13

machineWinXP Dual Core 2.6GHz 32-bit
notesCommand: pfgw32.exe -t -q"4891*2^1102896+1" 2>&1 PFGW Version [GWNUM 27.8] Primality testing 4891*2^1102896+1 [N-1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 3 Calling Brillhart-Lehmer-Selfridge with factored part 100.00% 4891*2^1102896+1 is prime! (2106.6335s+0.0413s) [Elapsed time: 2107 seconds]
modified2020-07-07 17:30:19
created2013-07-02 07:02:20

Query times: 0.0003 seconds to select prime, 0.0006 seconds to seek comments.
Printed from the PrimePages <primes.utm.edu> © Chris Caldwell.