2 · 3143552 - 1
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

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:2 · 3143552 - 1
Verification status (*):Proven
Official Comment:
Proof-code(s): (*):gb1 : Buechel, Keller, PRP, Proth.exe
Decimal Digits:68493   (log10 is 68492.0113875127)
Rank (*):47805 (digit rank is 1)
Entrance Rank (*):1397
Currently on list? (*):no
Submitted:8/12/2004 19:45:58 CDT
Last modified:8/12/2004 19:45:58 CDT
Removed (*):4/14/2006 01:24:48 CDT
Database id:71281
Status Flags:none
Score (*):38.3877 (normalized score 0.0035)

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.
machineLinux P4 2.8GHz
notesCommand: /home/caldwell/client/pfgw -f -tp -q"2*3^143552-1" 2>&1
PFGW Version 20031027.x86_Dev (Beta 'caveat utilitor') [FFT v22.13 w/P4]
Primality testing 2*3^143552-1 [N+1, Brillhart-Lehmer-Selfridge]
trial factoring to 22744888
Running N+1 test using discriminant 3, base 3+sqrt(3)
Using SSE2 FFT
Adjusting authentication level by 1 for PRIMALITY PROOF
Reduced from FFT(28672,20) to FFT(28672,19)
Reduced from FFT(28672,19) to FFT(28672,18)
Reduced from FFT(28672,18) to FFT(28672,17)
Reduced from FFT(28672,17) to FFT(28672,16)
455068 bit request FFT size=(28672,16)
Calling Brillhart-Lehmer-Selfridge with factored part 100.00%
2*3^143552-1 is prime! (-1857.3773s+0.0100s)
modified2004-08-21 09:00:56
created2004-08-12 19:53:00

Query times: 0.0005 seconds to select prime, 0.0006 seconds to seek comments.