22695 · 2247131 + 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:22695 · 2247131 + 1
Verification status (*):Proven
Official Comment:
Proof-code(s): (*):g79 : Stenzel, Proth.exe
Decimal Digits:74399   (log10 is 74398.1997886224)
Rank (*):46918 (digit rank is 1)
Entrance Rank (*):18
Currently on list? (*):no
Submitted:4/2/1999 03:34:17 CDT
Last modified:4/2/1999 03:34:17 CDT
Removed (*):10/4/2006 06:58:45 CDT
Database id:308
Status Flags:none
Score (*):38.6428 (normalized score 0.0044)

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.
machineWinXP P4 1.8GHz
notesPFGW Version 20021217.Win_Dev (Beta 'caveat utilitor') [FFT v22.7 w/P4] Running N-1 test using base 29 Primality testing 22695*2^247131+1 [N-1, Brillhart-Lehmer-Selfridge] Calling Brillhart-Lehmer-Selfridge with factored part 99.99% 22695*2^247131+1 is prime! (461.563000 seconds)
modified2003-03-25 11:21:48
created2003-01-22 07:17:33

Query times: 0.0004 seconds to select prime, 0.0006 seconds to seek comments.