502051417905 · 21290000 - 1
(Another of the Prime Pages' resources)
The Largest Known Primes Icon
  View this page in:   language help
 

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:502051417905 · 21290000 - 1
Verification status (*):Proven
Official Comment:
Proof-code(s): (*):L3203 : Scalise, TwinGen, PrimeGrid, LLR
Decimal Digits:388341   (log10 is 388340.39515473)
Rank (*):7796 (digit rank is 1294)
Entrance Rank (*):1105
Currently on list? (*):no
Submitted:3/15/2013 09:01:44 CDT
Last modified:3/15/2013 12:50:27 CDT
Removed (*):12/15/2015 13:19:59 CDT
Database id:111592
Status Flags:none
Score (*):43.7286 (normalized score 0.994)

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.
fieldvalue
prime_id111592
person_id9
machineDitto P4 P4
whattrial_divided
notesCommand: /home/ditto/client/TrialDiv/TrialDiv -q 502051417905 2 1290000 -1 2>&1
[Elapsed time: 10.312 seconds]
modified2013-03-21 09:38:26
created2013-03-15 09:05:21
id153504

fieldvalue
prime_id111592
person_id9
machineDitto P4 P4
whatprime
notesCommand: /home/ditto/client/llr.pl 502051417905*2^1290000-1 2>&1
Starting Lucas Lehmer Riesel prime test of 502051417905*2^1290000-1
Using Zero Padded IBDWT : Mersenne fftlen = 65536, Used fftlen = 131072
V1 = 5 ; Computing U0...
V1 = 5 ; Computing U0...done.
Starting Lucas-Lehmer loop...

502051417905*2^1290000-1 is prime! Time : 5660.207 sec.
[Elapsed time: 1.57 hours]
modified2013-03-21 09:38:26
created2013-03-15 10:48:49
id153512

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