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: 156733989 · 2100007-1 Verification status (*): Proven Official Comment: Twin (p) Proof-code(s): (*): L95 : Urushi, LLR Decimal Digits: 30114   (log10 is 30113.301939555) Rank (*): 30245 (digit rank is 2) Entrance Rank (*): 25659 Currently on list? (*): short Submitted: 12/27/2008 20:35:18 CDT Last modified: 12/27/2008 20:52:10 CDT Database id: 86062 Status Flags: none Score (*): 35.8514 (normalized score 0.0085)

Archival tags:

There are certain forms classed as archivable: these prime may (at times) remain on this list even if they do not make the Top 5000 proper.  Such primes are tracked with archival tags.

Twin Primes (archivable *)

Prime on list: yes, rank 12
Subcategory: "Twin (p)"
(archival tag id 191218, tag last modified 2009-08-13 16:21:06)

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.

field value prime_id 86062 person_id 9 machine Ditto P4 P4 what prime notes Command: /home/ditto/client/llr.pl 156733989*2^100007-1 2>&1 Starting Lucas Lehmer Riesel prime test of 156733989*2^100007-1 Using Zero Padded IBDWT : Mersenne fftlen = 5120, Used fftlen = 10240 V1 = 5 ; Computing U0... V1 = 5 ; Computing U0...done. Starting Lucas-Lehmer loop... 156733989*2^100007-1 is prime! Time : 26.957 sec. [Elapsed time: 27.00 seconds] modified 2009-02-05 12:51:35 created 2008-12-27 20:38:44 id 101590

field value prime_id 86062 person_id 9 machine RedHat P4 P4 what trial_divided notes Command: /home/caldwell/client/TrialDiv/TrialDiv -q 156733989 2 100007 -1 2>&1 [Ellapsed time: 9.094 seconds] modified 2009-02-05 12:51:35 created 2008-12-27 20:52:01 id 101592