8163 · 21247670 + 1
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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:

field (help)value
Description:8163 · 21247670 + 1
Verification status (*):Proven
Official Comment:
Proof-code(s): (*):L2583 : Nakamura, PSieve, Srsieve, PrimeGrid, LLR
Decimal Digits:375591   (log10 is 375590.00653988)
Rank (*):9979 (digit rank is 1)
Entrance Rank (*):2890
Currently on list? (*):no
Submitted:2/26/2014 17:14:04 CDT
Last modified:2/26/2014 21:52:20 CDT
Removed (*):4/2/2015 05:16:05 CDT
Database id:117300
Status Flags:TrialDiv
Score (*):43.626 (normalized score 0.752)

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/pfgw -t -q"8163*2^1247670+1" 2>&1
PFGW Version [GWNUM 26.5]
Primality testing 8163*2^1247670+1 [N-1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 5
Calling Brillhart-Lehmer-Selfridge with factored part 100.00%
8163*2^1247670+1 is prime! (4820.6972s+0.0014s)
[Elapsed time: 80.35 minutes]
modified2014-04-01 17:37:38
created2014-02-26 20:03:25

Query times: 0.0003 seconds to select prime, 0.0003 seconds to seek comments.